THE GRAY MATTER. 



619 



of the head or body (Ne) in the front part of the figure, and a transverse 

 section of the end of the tail (JVc) in the hind part of the figure are seen ; all 

 the intervening portion of the nucleus lies above the plane of the section. 

 In a transverse, dorso-ventral section taken somewhat anteriorly through the 

 front limb of the capsule (Fig. 140), the head or body of the nucleus cauda- 



FIG. 140. 



Diagrammatic Outline of a Transverse Dorso-ventral Section through the Right Hemisphere 

 (Man) at a Level Anterior to Fig. 139. (Sherrington.) Natural size. Nc, nucleus caudatus ; Gp', 

 Gp", globus pallidus, seen here in two segments, and Pt, putamen of nucleus lenticularis ; OT, 

 optic thalamus, with ca, anterior commissure, in close relation to cia, anterior limb of internal 

 capsule ; ce, external capsule ; op, optic tract ; cc, corpus callosum ; /, fornix ; Iv, a space that in its 

 upper part belongs to the lateral ventricle, in its lower was filled by the fold of subarachnoid tis- 

 sue and pia mater, the side fringe of which, covered with epithelium, forms the choroid plexus; 

 this fold was detached in the making of the section and was removed ; In, the insula ; F, frontal 

 lobe; P, parietal lobe ; T, temporal lobe. For greater clearness the cortical gray matter, which 

 is shaded in Fig. 139, is in this figure left unshaded. 



tus C/Vc), which has not yet reached its greatest dimensions, is seen lying 

 dorsal to the nucleus lenticularis, separated from it by the white mass of the 

 front limb (cia) of the capsule, though this is somewhat broken up by strands 

 of gray matter passing from one nucleus to the other. In a transverse dorso- 



