Qualitative and quantitative analysis of the callosal projections to prefrontal, frontal motor, and parietal areas in the macaque monkey.

ABSTRACT: In the macaque brain most cortical areas are connected through the corpus callosum to the same or different areas of the contralateral hemisphere (homotopic and heterotopic callosal connections). Many studies have described the callosal connectivity of several cortical areas, but the proportion of callosal vs. ipsilateral afferences and, except for frontal motor areas, of homotopic vs. heterotopic afferences is still unknown. We have analyzed qualitatively and quantitatively the distribution of callosal projecting neurons (CPNs) after neural tracer injections in prefrontal, frontal motor and opercular, and parietal areas (36 tracer injections in 20 macaques). The percentage of CPNs with respect to the total number of labeled neurons (ipsi + contra), with few exceptions, was at least 5% and

SUBMITTER: Rizzo M 

PROVIDER: S-EPMC12712016 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature