THE STRUCTURES AT THE BASE OF THE BRAIN. 



99 



tlialamic region. In front of it lie the mammillary bodies, those 

 two roundish ganglia which we studied in cross-section. To 

 these ganglia the bundle of Vicq d'Azyr passes from the thala- 



FlG. 57. 



The base of the brain. The left temporal lobe represented as in part transparent in 

 order to show the whole extent of the optic tract. 



mus, and from them the ascending fornix appears to emerge. 

 In front of the mammillary bodies we find a bulging down- 

 ward of the floor of the middle ventricle, which is called the 



