roo 



THE XERVOUS SYSTEM 



laminae. It also receives fibres fruui the inner segment of the globus pallidus. The ansa lentie- 

 iilaris enters the subthalamic region and passes beneath the red nucleus, where it becomes 

 indistinct. 



The claustrum is a thin hand of grey matter Avliich is placed, nearly vertically, 

 external to the lenticular nucleus, and separated from the latter, excei)t at its lower 

 part, by the outer capsule. It is separated from the grey matter of the island of 

 Reil by a laver of white matter, into which it sends small pointed })rocesses cor- 

 responding to the gyri operti of the island. It is fused at its anterior end with the 

 amygdaloid nucleus. (Hill.) 



Fig. 419. — Horizontal Section of the Cerebrum. 



(After Lanilois and Stirling.) 



G YE US FORNICA TVS 

 CORPUS CALLOSUM 



ASTERIOR CORXU 



CA UDA TE 



NUCLEUS 



IXXER CAPSULE 



{AXTERIOR LIMB) 



OUTER CAPSULE — 



LENTICULAR 



NUCLEUS 



CLAUSTRUM- 



IXXER CAPSULE 



(POSTERIOR LIMB) 



OPTIC THALAMUS 



CORPUS 

 GEXICULA TUM 

 IXTERXUM 

 CA UDA TE 

 XUCLEUS I 

 HIPPOCA MRUS — ^ 



MAJOR 



HIPPOCAMPUS 



MIXOR 



CLA VA 

 FUXICUL US CUXEA TUS ' 

 FUNICULUS GRACILIS 



SEPTUM 

 LUCID UM 



'ORPUS 



STRIA TUM 



— ANTERIOR 

 PILLAR OF 

 FORXIX 



— T.EXIA SEMI- 

 CIRCULARIS 



OPTIC 



THALAMUS 



CORPORA 

 QUADRI- 

 GEMIXA 



SUPERIOR 



PEDUXCLE OF 



CEREBELL UM 

 IXFERIOR 



PEDUXCLE 

 MIDDLE 



PEDUXCLE 



ALA CIXEREA 



OBEX 



The amygdaloid nucleus is a thickening of the grey cortex of the apex of the 

 temporal lobe, and produces a bulging (amygdaloid tubercle) into the roof of the 

 extremity 'of the descending cornu of the lateral ventricle. 



The taenia semicircularis, or stria terminalis, is a band of fibres which passes 

 upwards and backwards from the anterior ])illar of the fornix, traversing the 

 groove between the caudate nucleus and the optic thalamus. It accompanies the 

 caudate nucleus into the roof of the descending cornu, and ends in the amygdaloid 

 nucleus. In its course along the groove above mentioned it is partly covered l>v 

 the vein of the cor})us striatum and l>y a thickened band of ependyma, the lamina 

 cornea, which also covers the vein. 



