Figure 3.

Chimpanzee cortical anatomy and ROIs. Left hemispheres appear on the left. A, Chimpanzee cortical anatomy. Architectonic areas (top) and surface morphology of cerebral cortex (bottom). The nomenclature for sulci and gyri is based on Bailey et al. (1950), although our abbreviations follow more modern conventions. Cortical areas are denoted according to the system of Bailey et al. (1950) and Bailey (1948) based on Economo's system in humans (Economo and Parker, 1929). For most areas, there is a fairly straightforward correspondence between the Bailey et al. (1950) areas and their counterparts in Brodmannn's human map (Brodmannn, 1909; Von Bonin, 1948), and we have added Brodmannn numbers in parentheses below the Bailey et al. (1950) symbols. Areas thought to be homologous to BA 44 and BA 45 of humans occupy the posterior inferior frontal gyrus and adjacent part of the inferior frontal sulcus in chimpanzees, as discussed by Schenker et al. (2010). B, ROIs in FCBm and PFD/PF in each subject. CS, central sulcus; FOS, frontoorbital sulcus; IFG, inferior frontal gyrus; IFS, inferior frontal sulcus; IPL, inferior parietal lobule; IPS, intraparietal sulcus; LCaS, lateral calcarine sulcus; LOTS, lateral occipitotemporal sulcus; LS, lateral sulcus; LuS, lunate sulcus; MFG, middle frontal gyrus; MTG, middle temporal gyrus; MTS, middle temporal sulcus; PoCG, postcentral gyrus; PoCS, postcentral sulcus; PrCG, precentral gyrus; PrCS, precentral sulcus; SFG, superior frontal gyrus; SFS, superior frontal sulcus; SPL, superior parietal lobule.