Figure 1. Schematic drawing of the medial, lateral, and orbital surfaces of the macaque prefrontal cortex depicting parcellations according to (A) Walker, 1940, and (B) Carmichael and Price, 1994.

Macroanatomical landmarks are marked with red dashed lines; cgs, cingulate sulcus; ias, inferior arcuate sulcus; ps, principal sulcus; ros, rostral orbital sulcus; sas, superior arcuate sulcus.