102 



Cerebrum. 



442. Frontal Section of the Cerebrum, 



in the middle of the anterior third of the Corpus callosum. After 

 C. B. 11 ei chert. */ 3 natural size. 



The Corpus callosum roofs in the body and anterior cornu of the 

 lateral ventricles, Vcntriculi laterales, which are brought into view 

 after removal of their covering. Each lateral ventricle consists of a 

 central cavity or body, CeUa media, and three cornua, an 

 anterior, a posterior and an inferior or d e s c e n d i n g, which 

 extend from it in different directions. 



In the a n tori o r c o r n u o f the lateral ventricle are fount! : 

 a) The Corpus striatum, with a broad extremity directed forwards, 

 and a narrow end directed outwards and backwards. On the outer side of 

 the Corpus striatum is the lenticular or lentiform nucleus, Nude.us 

 lentiformifi, a biconvex grey mass, surrounded by white substance. In front and 

 below the lenticular nucleus a rounded mass of yellowish grey matter, the 

 Ruc/cus amygdalae, is situated, and on the outer side of the lenticular nucleus 

 is a thin lamina of grey matter, the CJaustrum. The white substance 

 between the lentiform nucleus and Corpus striatnm forms the internal 

 c a p s u 1 e, Cpsuhi interim, that between the lentiform nucleus and claustrum, 

 the external capsule, Capsula cjctcrna. 



b) The Tltalamiis optic.ux, situated behind the Corpus striatum, is 

 composed of white substance intermixed with grey matter. Between Corpus 

 striatum and optic thalamus is : 



