The Canonical Reward Circuit: Anatomy, Cell Types, and Emerging Complexity

The Canonical Reward Circuit: Anatomy, Cell Types, and Emerging Complexity

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• ^{1Citationpaper:paper-3bbdfb2ca5f7The previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...content/02_reward_circuit.md:line 5Open reference} The previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...

• ^{2Citationpaper:paper-9da047bf979dThe previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...content/02_reward_circuit.md:line 5Open reference} The previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...

• ^{3Citationpaper:paper-da3883b3b615The previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...content/02_reward_circuit.md:line 5Open reference} The previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...

• ^{4Citationpaper:paper-fbbcb3895a79The previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...content/02_reward_circuit.md:line 5Open reference} The previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...

• ^{5Citationpaper:paper-29ae007ec377The previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...content/02_reward_circuit.md:line 5Open reference} The previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...

• ^{6Citationpaper:paper-d64430fb1176The previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...content/02_reward_circuit.md:line 5Open reference} The previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...

• ^{7Citationpaper:paper-314e667f2e26The previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...content/02_reward_circuit.md:line 5Open reference} The previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...

• ^{8Citationpaper:paper-f549343f5758The previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...content/02_reward_circuit.md:line 5Open reference} The previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...

• ^{9Citationpaper:paper-ef6560ef3fa9The previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...content/02_reward_circuit.md:line 5Open reference} The previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...

• ^{10Citationpaper:paper-cb3356c67235The previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...content/02_reward_circuit.md:line 5Open reference} The previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...

• ^{2Citationpaper:paper-9da047bf979dThe previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...content/02_reward_circuit.md:line 5Open reference}0 The previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...

• ^{2Citationpaper:paper-9da047bf979dThe previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...content/02_reward_circuit.md:line 5Open reference}1 The previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...

• ^{2Citationpaper:paper-9da047bf979dThe previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...content/02_reward_circuit.md:line 5Open reference}2 The previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...

• ^{2Citationpaper:paper-9da047bf979dThe previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...content/02_reward_circuit.md:line 5Open reference}3 The VTA sits at the origin of the mesolimbic dopamine system, and its cellular composition has been quantified across multiple methods and species. The commonly cited approximation holds that the VTA comprises roughly 60% dopaminergic (DA), 30% GABAergic, and a smaller population of glutamatergic neurons — though it is important to note that these proportions are reported primarily in reviews and secondary sources r...

• ^{2Citationpaper:paper-9da047bf979dThe previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...content/02_reward_circuit.md:line 5Open reference}4 The VTA sits at the origin of the mesolimbic dopamine system, and its cellular composition has been quantified across multiple methods and species. The commonly cited approximation holds that the VTA comprises roughly 60% dopaminergic (DA), 30% GABAergic, and a smaller population of glutamatergic neurons — though it is important to note that these proportions are reported primarily in reviews and secondary sources r...

• ^{2Citationpaper:paper-9da047bf979dThe previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...content/02_reward_circuit.md:line 5Open reference}5 The VTA sits at the origin of the mesolimbic dopamine system, and its cellular composition has been quantified across multiple methods and species. The commonly cited approximation holds that the VTA comprises roughly 60% dopaminergic (DA), 30% GABAergic, and a smaller population of glutamatergic neurons — though it is important to note that these proportions are reported primarily in reviews and secondary sources r...

• ^{2Citationpaper:paper-9da047bf979dThe previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...content/02_reward_circuit.md:line 5Open reference}6 The VTA sits at the origin of the mesolimbic dopamine system, and its cellular composition has been quantified across multiple methods and species. The commonly cited approximation holds that the VTA comprises roughly 60% dopaminergic (DA), 30% GABAergic, and a smaller population of glutamatergic neurons — though it is important to note that these proportions are reported primarily in reviews and secondary sources r...

• ^{2Citationpaper:paper-9da047bf979dThe previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...content/02_reward_circuit.md:line 5Open reference}7 The VTA sits at the origin of the mesolimbic dopamine system, and its cellular composition has been quantified across multiple methods and species. The commonly cited approximation holds that the VTA comprises roughly 60% dopaminergic (DA), 30% GABAergic, and a smaller population of glutamatergic neurons — though it is important to note that these proportions are reported primarily in reviews and secondary sources r...

• ^{2Citationpaper:paper-9da047bf979dThe previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...content/02_reward_circuit.md:line 5Open reference}8 The VTA sits at the origin of the mesolimbic dopamine system, and its cellular composition has been quantified across multiple methods and species. The commonly cited approximation holds that the VTA comprises roughly 60% dopaminergic (DA), 30% GABAergic, and a smaller population of glutamatergic neurons — though it is important to note that these proportions are reported primarily in reviews and secondary sources r...

• ^{2Citationpaper:paper-9da047bf979dThe previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...content/02_reward_circuit.md:line 5Open reference}9 The VTA sits at the origin of the mesolimbic dopamine system, and its cellular composition has been quantified across multiple methods and species. The commonly cited approximation holds that the VTA comprises roughly 60% dopaminergic (DA), 30% GABAergic, and a smaller population of glutamatergic neurons — though it is important to note that these proportions are reported primarily in reviews and secondary sources r...

• ^{3Citationpaper:paper-da3883b3b615The previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...content/02_reward_circuit.md:line 5Open reference}0 The VTA sits at the origin of the mesolimbic dopamine system, and its cellular composition has been quantified across multiple methods and species. The commonly cited approximation holds that the VTA comprises roughly 60% dopaminergic (DA), 30% GABAergic, and a smaller population of glutamatergic neurons — though it is important to note that these proportions are reported primarily in reviews and secondary sources r...

• ^{3Citationpaper:paper-da3883b3b615The previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...content/02_reward_circuit.md:line 5Open reference}1 The emerging picture from single-cell transcriptomics complicates the tripartite classification further. A scRNA-seq study of mouse midbrain DA neurons found that approximately 30% of DA neurons in the VTA express gastrin-releasing peptide (GRP), identifying a molecularly distinct subpopulation with specific projection targets and functional properties ^{3Citationpaper:paper-da3883b3b615The previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...content/02_reward_circuit.md:line 5Open reference}2. This molecular diversity within the dopaminergi...

• ^{3Citationpaper:paper-da3883b3b615The previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...content/02_reward_circuit.md:line 5Open reference}3 The emerging picture from single-cell transcriptomics complicates the tripartite classification further. A scRNA-seq study of mouse midbrain DA neurons found that approximately 30% of DA neurons in the VTA express gastrin-releasing peptide (GRP), identifying a molecularly distinct subpopulation with specific projection targets and functional properties ^{3Citationpaper:paper-da3883b3b615The previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...content/02_reward_circuit.md:line 5Open reference}4. This molecular diversity within the dopaminergi...

• ^{3Citationpaper:paper-da3883b3b615The previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...content/02_reward_circuit.md:line 5Open reference}5 The emerging picture from single-cell transcriptomics complicates the tripartite classification further. A scRNA-seq study of mouse midbrain DA neurons found that approximately 30% of DA neurons in the VTA express gastrin-releasing peptide (GRP), identifying a molecularly distinct subpopulation with specific projection targets and functional properties ^{3Citationpaper:paper-da3883b3b615The previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...content/02_reward_circuit.md:line 5Open reference}6. This molecular diversity within the dopaminergi...

• ^{3Citationpaper:paper-da3883b3b615The previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...content/02_reward_circuit.md:line 5Open reference}7 The emerging picture from single-cell transcriptomics complicates the tripartite classification further. A scRNA-seq study of mouse midbrain DA neurons found that approximately 30% of DA neurons in the VTA express gastrin-releasing peptide (GRP), identifying a molecularly distinct subpopulation with specific projection targets and functional properties ^{3Citationpaper:paper-da3883b3b615The previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...content/02_reward_circuit.md:line 5Open reference}8. This molecular diversity within the dopaminergi...

• ^{3Citationpaper:paper-da3883b3b615The previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...content/02_reward_circuit.md:line 5Open reference}9 The emerging picture from single-cell transcriptomics complicates the tripartite classification further. A scRNA-seq study of mouse midbrain DA neurons found that approximately 30% of DA neurons in the VTA express gastrin-releasing peptide (GRP), identifying a molecularly distinct subpopulation with specific projection targets and functional properties ^{4Citationpaper:paper-fbbcb3895a79The previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...content/02_reward_circuit.md:line 5Open reference}0. This molecular diversity within the dopaminergi...

• ^{4Citationpaper:paper-fbbcb3895a79The previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...content/02_reward_circuit.md:line 5Open reference}1 The emerging picture from single-cell transcriptomics complicates the tripartite classification further. A scRNA-seq study of mouse midbrain DA neurons found that approximately 30% of DA neurons in the VTA express gastrin-releasing peptide (GRP), identifying a molecularly distinct subpopulation with specific projection targets and functional properties ^{4Citationpaper:paper-fbbcb3895a79The previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...content/02_reward_circuit.md:line 5Open reference}2. This molecular diversity within the dopaminergi...

• ^{4Citationpaper:paper-fbbcb3895a79The previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...content/02_reward_circuit.md:line 5Open reference}3 The emerging picture from single-cell transcriptomics complicates the tripartite classification further. A scRNA-seq study of mouse midbrain DA neurons found that approximately 30% of DA neurons in the VTA express gastrin-releasing peptide (GRP), identifying a molecularly distinct subpopulation with specific projection targets and functional properties ^{4Citationpaper:paper-fbbcb3895a79The previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...content/02_reward_circuit.md:line 5Open reference}4. This molecular diversity within the dopaminergi...

• ^{4Citationpaper:paper-fbbcb3895a79The previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...content/02_reward_circuit.md:line 5Open reference}5 The emerging picture from single-cell transcriptomics complicates the tripartite classification further. A scRNA-seq study of mouse midbrain DA neurons found that approximately 30% of DA neurons in the VTA express gastrin-releasing peptide (GRP), identifying a molecularly distinct subpopulation with specific projection targets and functional properties ^{4Citationpaper:paper-fbbcb3895a79The previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...content/02_reward_circuit.md:line 5Open reference}6. This molecular diversity within the dopaminergi...

• ^{4Citationpaper:paper-fbbcb3895a79The previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...content/02_reward_circuit.md:line 5Open reference}7 The emerging picture from single-cell transcriptomics complicates the tripartite classification further. A scRNA-seq study of mouse midbrain DA neurons found that approximately 30% of DA neurons in the VTA express gastrin-releasing peptide (GRP), identifying a molecularly distinct subpopulation with specific projection targets and functional properties ^{4Citationpaper:paper-fbbcb3895a79The previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...content/02_reward_circuit.md:line 5Open reference}8. This molecular diversity within the dopaminergi...

• ^{4Citationpaper:paper-fbbcb3895a79The previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...content/02_reward_circuit.md:line 5Open reference}9 Side A — Relative homogeneity: VTA DA neurons form a relatively homogeneous population encoding reward prediction errors (RPEs), with GABA and glutamate neurons providing local modulation ^{5Citationpaper:paper-29ae007ec377The previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...content/02_reward_circuit.md:line 5Open reference}0.

• ^{5Citationpaper:paper-29ae007ec377The previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...content/02_reward_circuit.md:line 5Open reference}1 Side B — Extensive heterogeneity: VTA contains highly heterogeneous DA neuron subtypes defined by projection target, molecular markers, and functional properties. Some DA neurons encode aversion, and co-release of DA with glutamate or GABA adds functional diversity ^{5Citationpaper:paper-29ae007ec377The previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...content/02_reward_circuit.md:line 5Open reference}2.

• ^{5Citationpaper:paper-29ae007ec377The previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...content/02_reward_circuit.md:line 5Open reference}3 Side B — Extensive heterogeneity: VTA contains highly heterogeneous DA neuron subtypes defined by projection target, molecular markers, and functional properties. Some DA neurons encode aversion, and co-release of DA with glutamate or GABA adds functional diversity ^{5Citationpaper:paper-29ae007ec377The previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...content/02_reward_circuit.md:line 5Open reference}4.

• ^{5Citationpaper:paper-29ae007ec377The previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...content/02_reward_circuit.md:line 5Open reference}5 Side B — Extensive heterogeneity: VTA contains highly heterogeneous DA neuron subtypes defined by projection target, molecular markers, and functional properties. Some DA neurons encode aversion, and co-release of DA with glutamate or GABA adds functional diversity ^{5Citationpaper:paper-29ae007ec377The previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...content/02_reward_circuit.md:line 5Open reference}6.

• ^{5Citationpaper:paper-29ae007ec377The previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...content/02_reward_circuit.md:line 5Open reference}7 Side B — Extensive heterogeneity: VTA contains highly heterogeneous DA neuron subtypes defined by projection target, molecular markers, and functional properties. Some DA neurons encode aversion, and co-release of DA with glutamate or GABA adds functional diversity ^{5Citationpaper:paper-29ae007ec377The previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...content/02_reward_circuit.md:line 5Open reference}8.

• ^{5Citationpaper:paper-29ae007ec377The previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...content/02_reward_circuit.md:line 5Open reference}9 Side B — Extensive heterogeneity: VTA contains highly heterogeneous DA neuron subtypes defined by projection target, molecular markers, and functional properties. Some DA neurons encode aversion, and co-release of DA with glutamate or GABA adds functional diversity ^{6Citationpaper:paper-d64430fb1176The previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...content/02_reward_circuit.md:line 5Open reference}0.

• ^{6Citationpaper:paper-d64430fb1176The previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...content/02_reward_circuit.md:line 5Open reference}1 Side B — Extensive heterogeneity: VTA contains highly heterogeneous DA neuron subtypes defined by projection target, molecular markers, and functional properties. Some DA neurons encode aversion, and co-release of DA with glutamate or GABA adds functional diversity ^{6Citationpaper:paper-d64430fb1176The previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...content/02_reward_circuit.md:line 5Open reference}2.

• ^{6Citationpaper:paper-d64430fb1176The previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...content/02_reward_circuit.md:line 5Open reference}3 Status: Consensus shifting toward heterogeneity. The implication is that therapeutic strategies targeting “the dopamine system” may need to be refined to target specific DA subpopulations ^{6Citationpaper:paper-d64430fb1176The previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...content/02_reward_circuit.md:line 5Open reference}4.

• ^{6Citationpaper:paper-d64430fb1176The previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...content/02_reward_circuit.md:line 5Open reference}5 Status: Consensus shifting toward heterogeneity. The implication is that therapeutic strategies targeting “the dopamine system” may need to be refined to target specific DA subpopulations ^{6Citationpaper:paper-d64430fb1176The previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...content/02_reward_circuit.md:line 5Open reference}6.

• ^{6Citationpaper:paper-d64430fb1176The previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...content/02_reward_circuit.md:line 5Open reference}7 VTA cellular composition estimates across studies using different methodologies. (A) Values represent percentage of VTA neurons classified by neurotransmitter identity. The commonly cited 60/30/10 split (DA/GABA/glutamate) is an approximation; actual proportions depend on VTA subregion boundaries and counting method. (B) Molecular heterogeneity within the DA population: scRNA-seq reveals that approximately 30% of VT...

• ^{6Citationpaper:paper-d64430fb1176The previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...content/02_reward_circuit.md:line 5Open reference}8 The functional significance of VTA GABAergic neurons extends beyond local circuit modulation. These neurons project to the NAc, lateral habenula, and PFC, providing inhibitory control over multiple targets ^{6Citationpaper:paper-d64430fb1176The previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...content/02_reward_circuit.md:line 5Open reference}9. Local VTA GABA interneurons regulate DA neuron firing through disinhibition, and disruption of this balance has been implicated in the acute reinforcing effects of several drug classes [Basa...

• ^{7Citationpaper:paper-314e667f2e26The previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...content/02_reward_circuit.md:line 5Open reference}0 The functional significance of VTA GABAergic neurons extends beyond local circuit modulation. These neurons project to the NAc, lateral habenula, and PFC, providing inhibitory control over multiple targets ^{7Citationpaper:paper-314e667f2e26The previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...content/02_reward_circuit.md:line 5Open reference}1. Local VTA GABA interneurons regulate DA neuron firing through disinhibition, and disruption of this balance has been implicated in the acute reinforcing effects of several drug classes [Basa...

• ^{7Citationpaper:paper-314e667f2e26The previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...content/02_reward_circuit.md:line 5Open reference}2 The functional significance of VTA GABAergic neurons extends beyond local circuit modulation. These neurons project to the NAc, lateral habenula, and PFC, providing inhibitory control over multiple targets ^{7Citationpaper:paper-314e667f2e26The previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...content/02_reward_circuit.md:line 5Open reference}3. Local VTA GABA interneurons regulate DA neuron firing through disinhibition, and disruption of this balance has been implicated in the acute reinforcing effects of several drug classes [Basa...

• ^{7Citationpaper:paper-314e667f2e26The previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...content/02_reward_circuit.md:line 5Open reference}4 The functional significance of VTA GABAergic neurons extends beyond local circuit modulation. These neurons project to the NAc, lateral habenula, and PFC, providing inhibitory control over multiple targets ^{7Citationpaper:paper-314e667f2e26The previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...content/02_reward_circuit.md:line 5Open reference}5. Local VTA GABA interneurons regulate DA neuron firing through disinhibition, and disruption of this balance has been implicated in the acute reinforcing effects of several drug classes [Basa...

• ^{7Citationpaper:paper-314e667f2e26The previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...content/02_reward_circuit.md:line 5Open reference}6 The functional significance of VTA GABAergic neurons extends beyond local circuit modulation. These neurons project to the NAc, lateral habenula, and PFC, providing inhibitory control over multiple targets ^{7Citationpaper:paper-314e667f2e26The previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...content/02_reward_circuit.md:line 5Open reference}7. Local VTA GABA interneurons regulate DA neuron firing through disinhibition, and disruption of this balance has been implicated in the acute reinforcing effects of several drug classes [Basa...

• ^{7Citationpaper:paper-314e667f2e26The previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...content/02_reward_circuit.md:line 5Open reference}8 The functional significance of VTA GABAergic neurons extends beyond local circuit modulation. These neurons project to the NAc, lateral habenula, and PFC, providing inhibitory control over multiple targets ^{7Citationpaper:paper-314e667f2e26The previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...content/02_reward_circuit.md:line 5Open reference}9. Local VTA GABA interneurons regulate DA neuron firing through disinhibition, and disruption of this balance has been implicated in the acute reinforcing effects of several drug classes [Basa...

• ^{8Citationpaper:paper-f549343f5758The previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...content/02_reward_circuit.md:line 5Open reference}0 The functional significance of VTA GABAergic neurons extends beyond local circuit modulation. These neurons project to the NAc, lateral habenula, and PFC, providing inhibitory control over multiple targets ^{8Citationpaper:paper-f549343f5758The previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...content/02_reward_circuit.md:line 5Open reference}1. Local VTA GABA interneurons regulate DA neuron firing through disinhibition, and disruption of this balance has been implicated in the acute reinforcing effects of several drug classes [Basa...

• ^{8Citationpaper:paper-f549343f5758The previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...content/02_reward_circuit.md:line 5Open reference}2 The functional significance of VTA GABAergic neurons extends beyond local circuit modulation. These neurons project to the NAc, lateral habenula, and PFC, providing inhibitory control over multiple targets ^{8Citationpaper:paper-f549343f5758The previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...content/02_reward_circuit.md:line 5Open reference}3. Local VTA GABA interneurons regulate DA neuron firing through disinhibition, and disruption of this balance has been implicated in the acute reinforcing effects of several drug classes [Basa...

• ^{8Citationpaper:paper-f549343f5758The previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...content/02_reward_circuit.md:line 5Open reference}4 The dominant computational framework for VTA DA function in addiction has been the reward prediction error (RPE) model, which holds that phasic DA signals encode the discrepancy between expected and received rewards. This framework, commonly described as the core mechanism driving drug-associated learning ^{8Citationpaper:paper-f549343f5758The previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...content/02_reward_circuit.md:line 5Open reference}5, has been enormously productive. However, it faces a signific...

• ^{8Citationpaper:paper-f549343f5758The previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...content/02_reward_circuit.md:line 5Open reference}6 The dominant computational framework for VTA DA function in addiction has been the reward prediction error (RPE) model, which holds that phasic DA signals encode the discrepancy between expected and received rewards. This framework, commonly described as the core mechanism driving drug-associated learning ^{8Citationpaper:paper-f549343f5758The previous section posed a deceptively simple question: what circuitry does the addiction field agree on? The answer, it turns out, is both more settled and more contested than textbook accounts suggest. A core mesolimbic framework — the ventral tegmental area (VTA) projecting to the nucleus accumbens (NAc) and prefrontal cortex (PFC) — is supported by convergent anatomical, electrophysiological, and genetic evide...content/02_reward_circuit.md:line 5Open reference}7, has been enormously productive. However, it faces a signific...

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