PROJECTION OP THE RETINA IN THE BRAIN 



11 



We shall now turn to monkeys. This animal is of the 

 highest interest for clinical purposes, because in this respect 

 the relations in monkeys and in men are about the same. 

 The eyes stand quite frontal in the head, just as in man. 

 There is a real macula, just as in man. The form of the 

 geniculate body is about the same and this ganglion is 

 shifted to the outside of the brain. It lies at its base, just 



as m man. 



CROSSED 



CAUDAAL 



UNCROSSED 

 CAUDAAL 



ORAAL 



X^= NASAL LOWER, 

 =NASAL UPPER. 



^=Temporal lower. 

 [W]=Temporal Upper 



Fig. 2. Projection op the Various Quadrants of the Retina on the 

 Crossed and Uncrossed External Geniculate Body in Cats 



(After Overboseh) 



The operations were always made on the left eye. In one 

 case the left eye was totally extirpated, while in fifteen 

 other animals partial lesions were made. These may be 

 divided into three groups. In the first, different parts of the 

 retina were injured without damaging the macula; in the 

 second group the macula was involved, the remaining part 

 of the retina being spared; while in the third, lesions were 

 made in the macula as well as in the periphery. 



