430 THE BRAIN OF MAMMALS, BY TH. MEYNERT. 



of which it is imbedded (fig. 243, between Th and P). The first 

 representation of a converging system of radii from the internal 

 capsule into the optic thalamus in sections of the cerebrum was 

 made by Kolliker, whose histological illustration of the structure 



Fig. 247. 



Fig. 247. Transparent sagittal section through the anterior tubercle 

 of the optic thalamus of Man. Ta, Tuberculum anterius ; JK, in- 

 ternal layer of the optic thalamus ; K, corpora quadrigemina ; W, 

 wall of the aquaeductus Sylvii ; RK, red nucleus of the tegmentum ; 

 SS, substantia nigra ; F, pes of the crus cerebri (crusta) ; 11, tractus 

 opticus ; n', basal ganglion of the optic nerve ; Zi, stratum zonale ; 

 c c, anterior commissure ; Ch, posterior commissure curving down- 

 wards to the tegmentum of the crus cerebri ; G, ascending crus of the 

 f ornix ; Jk, L, Schl, three converging fasciculi, which coalesce to form 

 the loop of the crus cerebri Jk, inferior peduncle of the optic thala- 

 mus ; L, the posterior longitudinal fasciculus ; Schl, the loop of the 

 pes cerebri proceeding from the lenticular nucleus. 



of the brain, in regard to its microscopic anatomy, combines rare 

 knowledge of the organ with accurate microscopical detail. 



The posterior region of that part of the optic thalamus 

 which still lies in the third ventricle, and consequently anterior 



