What resolves this contention: Reliability of viral retrograde tools versus imm…

What resolves this contention: Reliability of viral retrograde tools versus immunohistochemical/EM techniques for primate thalamostriatal anatomy: rAAV2-retro misses primate intralaminar inputs while vGluT2 EM detects them. / Retrograde rAAV2-retro fails to label intralaminar thalamostriatal axons in macaques although it labels them in rats — indicating a species-specific tropism limitation for primate thalamostriatal anatomy. / vGluT2-positive thalamostriatal terminals onto cholinergic interneurons can be quantified in macaque caudate using conventional immuno-EM, supporting reliable primate thalamostriatal anatomical access.