BASAL GANGLIA 



463 



of a large number of grey and white striae which pass 

 between the two grey masses. It is because of the union 

 and because of the striate appearance in the region of 

 the union that the caudate nucleus and the lentiform nucleus 

 are spoken of, together, as the corpus striatum. (2) That, 

 in the second section, which passes through the region of the 

 anterior perforated substance (Fig. 1 86), the lower surface of the 



Longitudinal fissure 



Corpus callosum 



Lateral ventricle 



Chorioid plexus ' 

 Interventricular foramen 



Right column of fornix 



Claustrum 



Internal capsule 



Lentiform nucleus ~ Corpus 

 Caudate nucleus /striatum 



Septum pellucidum 



FIG. 185. Frontal section through the Cerebral Hemisphere cutting through 

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



anterior parts of the lentiform and caudate nuclei are blending 

 with the anterior perforated substance. (3) That, in the third 

 section, which passes between the tuber cinereum and the 

 mamillary bodies, the main features referred to in the account 

 of the horizontal section are again visible, but that there are 

 some modifications due to the different plane of section (Fig. 

 187). The points of difference to be noted are (a) That 

 the caudate nucleus, the stria terminalis and the lateral part 

 of the upper surface of the thalamus lie, in this section, in the 



