1932] Poliak: A^ event Fiber Systeim, Primate Cerebral Cortex 165 



Just as one sing^le definite centra] visual paths exists, so also there 

 is but one terminal cortical area, primary or projectional visual 

 cortical area. Althoug^h in the preceding experiments various portions 

 of the visual radiation were interrupted and degenerated, it has been 

 found that visual fibers enter exclusively the striate area of Elliot 



FcaLc 



Fig. 21. A diagram showing the position and the extent of the visual pro- 

 jection cortex in the brain of the monkey as determined in the present investi- 

 gation. Tliis area is identical with the area sti-iata of Elliot Smith or Brodmann's 

 field 17 (compare with fig. 7) both on the lateral face (upper figure) and on the 

 medial face of the hemisphere (lower figure). In the monkey the striate area 

 along the undivided horizontal branch of the calcarine fissure (Fcalc) remains 

 hidden in the fissure, emerging on the surface only along the ascending and 

 descending branches of that fissure. Over the convex face of the occipital lobe 

 in the monkey the striate area extends over the greater part of the occipital 

 operculum (Oo) behind the simian sulcus (Ss) and is divided into two unequal 

 portions, an upper and a lower, by the superior occipital or external ealcaxine 

 sulcus (Sos). 



Smith or field 17 of Brodmann, corresponding with area OC of 

 Economo-Koskinas. No afferent fibers which could be called visual 

 were seen to enter any other area of the occipital, much less the 



