76 



BRAINS OF RATS AND MEN 



illustrate their arrangement as seen in cross-section. 

 Their relations to the underlying reflex centers are 

 significant. The ventromedial sector of the wall of 

 the hemisphere (septum) is a reflex center concerned 



olfactory bulb 



septum 



pLjriform 

 cortex 



hLjpopallium 



general cortex 



hippocompal 

 cortex 



thalomus 



dbram 



Fig. io. — Diagrammatic longitudinal section through the forebrain 

 of the box-tortoise, Cistudo, to illustrate the arrangement of the cortical 

 fields. In mammals most of the hypopallium is incorporated into the 

 corpus striatum; see pp. io8, 114. 



mainly with correlation of olfactory, gustatory, and 

 visceral activities. The ventrolateral sector (corpus 

 striatum complex) is a reflex center with connections 

 similar to those of the septum and in addition a 

 broad connection with the exteroceptive centers of 



