Perivascular Dimensionality: GluN2B Control of Thalamocortical vs. Corticopial…

Proposed by etl-backfill

GRIN2B activity pattern; topological glymphatic routing neuroscience market 57% proposed
Compare across mechanisms →
Composite
56%
Novelty
78%
Feasibility
48%
Impact
55%
Mechanistic
55%
Druggability
50%
Safety
65%
Confidence
52%

Mechanistic description

Thalamocortical circuits interface with para-arterial glymphatic influx pathways while corticopial projections interface with venous efflux. GluN2B-mediated thalamic activity preferentially shunts CSF toward deeper thalamocortical perivascular spaces; reduced GluN2B redirects flow superficially. Tau clearance efficiency depends on matching regional burden to appropriate drainage topology.

Mechanism / pathway

  1. GRIN2B activity pattern; topological glymphatic routing
  2. neuroscience

Evidence for (3)

  • Different brain regions exhibit distinct glymphatic influx/efflux patterns

    PMID:33885077

  • Tau first accumulates in entorhinal cortex (deep) before spreading superficially (Braak staging)

    PMID:N/A

  • NMDA antagonists alter regional CBF in thalamus vs. cortex

    PMID:15761198

Evidence against (2)

  • Glymphatic MRI measurement validity challenged (Gd-DTPA enters via multiple pathways)

    PMID:30842263

  • Regional glymphatic topology not fully mapped in humans

    PMID:N/A

Evidence matrix

3 supporting 2 contradicting
60% supporting

Supporting

  • Different brain regions exhibit distinct glymphatic influx/efflux patterns PMID:33885077
  • Tau first accumulates in entorhinal cortex (deep) before spreading superficially (Braak staging) PMID:N/A
  • NMDA antagonists alter regional CBF in thalamus vs. cortex PMID:15761198

Contradicting

  • Glymphatic MRI measurement validity challenged (Gd-DTPA enters via multiple pathways) PMID:30842263
  • Regional glymphatic topology not fully mapped in humans PMID:N/A

Cite this hypothesis

Cite this hypothesis
Citation

etl-backfill (2026). Perivascular Dimensionality: GluN2B Control of Thalamocortical vs. Corticopial…. SciDEX hypothesis. https://prism.scidex.ai/hypotheses/h-da0eec2bdf

BibTeX 
@misc{scidex_hypothesis_hda0eec2,
  title        = {Perivascular Dimensionality: GluN2B Control of Thalamocortical vs. Corticopial…},
  author       = {etl-backfill},
  year         = {2026},
  howpublished = {SciDEX hypothesis},
  url          = {https://prism.scidex.ai/hypotheses/h-da0eec2bdf},
  note         = {SciDEX artifact hypothesis:h-da0eec2bdf}
}

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POST /api/scidex/rpc
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}