BASAL GANGLIA 



bulges more than the lateral surface, and its point of highest 

 convexity is placed opposite the stria terminalis or the 

 interval between the caudate nucleus and the anterior end 

 of the thalamus. 



When seen in frontal section, the .appearance presented 

 by the lentiform nucleus differs very much in the different 

 planes of section. Figure 215 represents a section through 



Corpus callosum 

 Longitudinal fissure 



Lateral ventricle / ! 



Chorioid plexus j 



Interventricular foramen 



Right column of forn x 



Claustrum 



Internal capsule 



Lentiform nucleus 

 Caudate nucleus 

 Septum pellucidum H 



FIG. 215. Frontal section through the Cerebral Hemisphere cutting through 

 the anterior part of the lentiform nucleus. Seen from the anterior end. 



its anterior portion. Here it is semilunar or crescentic in 

 outline. Further, it is intimately connected with the head 

 of the caudate nucleus by bands of grey matter which pass 

 between the two nuclei and break up the anterior part of the 

 internal capsule. It is due to the ribbed or barred appear- 

 ance which is presented by such a section as this that the 

 term corpus striatum is given to the two nuclei. 



When the section is made in a more posterior plane, the 

 divided lentiform nucleus assumes an altogether different 

 shape, and is seen to be completely cut off from the caudate 



