THE INTERNAL CONFIGURATION OF THE CEREBRAL HEMISPHERES 



253 



two former, together with the white fascicles of the internal capsule which 

 separate them, constitute the corpus striatum (Fig. 185). 



The caudate nucleus (nucleus caudatus) is an elongated mass of gray matter 

 bent on itself like a horseshoe, and is throughout its entire extent closely re- 



Caudate nucleus 

 Thalamos 



Lenticular nucleus 

 Amygdaloid nucleus 

 Caudate nucleus 



Thalamus 



Tail of caudate nucleus 



Internal capsule 

 Lenticular nucleus 



Caudate nucleus 

 Thalamus 



Tail of caudate nucleus 

 Internal capsule 



Fig. 185. Diagrams of lateral view and sections of the nuclei of the corpus striatum with the 

 internal capsule omitted. A and B below represent horizontal sections along the lines A and B 

 in the figure above. The figure also shows the relative position of the thalamus and the amygda- 

 loid nucleus. (Jackson- Morris.) 



lated to the lateral ventricle (Figs. 91, 177, 178, 186, 187, 188, 191). Its swol- 

 len rostral extremity or head is pear shaped and bulges into the anterior horn of 

 the lateral ventricle. The remainder of the nucleus is drawn out into a long, 

 slender, highly arched tail. In the floor of the central part of the ventricle the 

 head gradually tapers off into the tail, which finally curves around into the roof 



