252 



THE NERVOUS SYSTEM 



mater, and especially from that part of it enclosed in the transverse fissure and 

 known as the tela chorioidea of the third ventricle. It is covered throughout 



Longitudinal fissure of cerebrum 



Anterior horn of lateral 

 ventricle 



Corpus striatum-, : 

 Interventricular for. 



Columns offornix 



Central portion of 



lateral ventricle 



Internal cerebral 



veins 



Chorioid vein 

 Chorioid artery 



Inferior horn of 

 lateral ventricle 



Collateral trigone 

 Posterior horn 



Body of corpus callosum 

 .Lamina of septum pellucidum 



-Cavity of sept, pellucidum 



L .Lamina: of septum 



pellucidum 



-Vein of septum 



pellucidum 



Terminal vein 

 ,-Thalamus 



-J, --Corpus striatum 

 Lateral chorioid 

 2<jL - ' plexus 

 "^ / -Tel a chorioidea 

 of third ventricle 



'Chorioid glomus 



Calcar a^jis ll^^^B 



Great cerebral vein Hippocampal Body of corpus Body offornix Crura offornix 

 commissure callosum 



Fig. 184. Dissection of the human brain to show the tela chorioidea of. the third ventricle 

 and the hippocampal commissure. The body of the corpus callosum and the fornix have been 

 divided and reflected. Dorsal view, except that the ventral surfaces of the reflected corpus 

 callosum and hippocampal commissure are seen. (Sobotta-McMurrich.) 



by a layer of epithelium of ependymal origin, which is adapted to every uneven- 

 ness of its surface (Fig. 155). 



THE BASAL GANGLIA OF THE TELENCEPHALON 



There are four deeply placed masses of gray matter within the hemisphere, 

 known as the caudate, lentiform and amygdaloid nuclei, and the claustrum. The 



