CHAP, ii.] 



THE BRAIN. 



973 



FIG. 116. DIAGRAMMATIC OUTLINE OF A TRANSVERSE DORSOVENTRAL SECTION THROUGH 

 THE RIGHT HEMISPHERE (MAN), AT LEVEL POSTERIOR TO THE KNEE OF THE 

 INTERNAL CAPSULE. (Natural size. ) (Sherrington.) 



Nc, nucleus eaudatus; in the upper part of the figure, the section of the nucleus 

 is through the narrower portion which succeeds the wider front end or head ; 

 in the lower part of the figure the section passes through the tail of the 

 nucleus near its end, and this portion of it has for the sake of clearness been 

 sundered from the grey matter of Na, nucleus amygdal, more distinctly than 

 in reality is the case. Gp', Gp" globus pallidus, seen here in two segments, and 

 Pt. putamen of nucleus lenticularis. an. the anterior, in. the inner, and In. the 

 lateral nucleus of the optic thalamus ; at //. is seen the "latticed layer" lying 

 next to dp. the posterior lirnb of the internal capsule and containing many 

 strands of fibres which mingle with it. In the thalamus between the anterior 

 and internal nuclei on the one hand and the lateral nucleus on the other is a 

 layer shaded less deeply in the figure, representing the internal medullary lamina 

 of the thalamus, consisting largely of white matter. Other collections of white 

 matter within the thalamus are Vb, the bundle of Vicq. d'Azyr and F' the lower 

 end of the anterior pillar of the fornix. F. The upper end of the anterior 

 pillar of the fornix, below cc the corpus callosum. Csb. corpus subthalamicum, 

 forming a fairly continuous mass with the thalamus ; Sn. substantia nigra. 

 cl. Claustrum ; ce. external capsule. Ca. terminal portion of anterior com- 



