1932] Poliak: Afferent Fiber Systems, Primate Cerebral Cortex 295 



Fig. 90, Experiment XIV. Within the opercular subcortical substance the 

 number of degenerated fibers is still further decreased, this substance as well 

 as the striate cortex of the occipital operculum (Oo) is divided into two halves 

 by the forward thrust of the cortex of the simian sulcus (S^). From the upper 

 degenerated zone of the sagittal strata, numerous association fibers begin to 

 ascend to reach here, and in the following sections, the cortex around the upper 

 extremity of the simian sulcus. Calcarine fissure (Fc) . 



