CEREBRUM 



195 



Flechsig finds that this area is supplied by a band of fibres 

 which very early get their myeliri sheath (fig. 100A 5). 



Around this area is a zone, lesions in which cause disturbances 

 in vision less profound in character than those produced in the 

 region of the calcarine fissure. This zone has a characteristic 

 cell arrangement, but no line of Gennari. It is very slightly 

 developed in lower mammals, but becomes well marked in the 

 primates and especially in man. It is supplied with associating 

 fibres joining it to the last area, and these fibres become medul- 

 lated at a comparatively late date. 



FIG. lOOfi. To show Flechsig's Primary Projection Areas on the outer aspect of the 

 Cerebral Cortex (see text). (HOWELL.) 



It would seem as if this were the region in which the 

 simple visual sensations become associated with the stored 

 passed experiences so as to give rise to the perception of 

 the significance of these sensations. It has been termed 

 the visuo-psyehie area of the cortex (fig. 101). 



The visuo-sensory area is united by a strong band 

 through the middle cerebral peduncle with the cerebellum 

 (see p. 186), and from it a strong band of fibres passes to 

 an area in the frontal region, concerned with the movements 



