92 



LECTURES ON THE CENTRAL NERVOUS SYSTEM. 



Back of and underneath the thalamus there lie alongside 

 it a number of small nuclei whose functions and significance are 

 almost wholly unknown. Their anatomical relations are as yet 

 in great measure unexplored. On the base of the brain, just 

 back of the plane of the section in Fig. 52, where the central 

 gray matter forms the floor of the ventricle, there lies, on each 

 side under the thalamus, a small, white tubercle, the corpus 

 mamillare or corpus candicans. In Fig. 49 it falls just in the 

 plane of the section. The mammillary body may be regarded as 

 the boundary-point between the fore- and inter- brains, for from 



FIG. 53. 



Frontal section through the thalamus and the corpus mamillare to show a portion of the 

 fibres originating in this region. (Diagrammatic.) 



Bindearm, Anterior eerebellar peduncle. 



HaubenbUndel, Fasciculus to tegmentum. 



it appear to emerge, partly crossed and partly direct, those 

 bundles to the fornix which follow along the free border of the 

 hemisphere, and whose further course is shown in Fig. 30. 



The corpus candicans consists, according to the researches 

 of Gudden, of three nuclei. The most lateral sends a pedicle 

 (pedunculus corporis mamillaris) far back into the medulla 

 oblongata. From the more caudad of the two median nuclei 

 arises a thick bundle, which passes up into the thalamus and is 

 lost in the tuberculum anterius. One portion of its course is 

 shown in Fig. 49. It was formerly thought that it arose in the 







