The anatomy of the nervous system, from the standpoint of development and function . cation of the chorioid plexus of the lateral ventricle. The chorioid plexus of the lateral ventricle (Figs. 183, 184. 188) is continuouswith that of the third ventricle at the interventricular foramen, from whichpoint it can be followed backward through the central part into the inferiorhorn. It is coextensive with the chorioid fissure and is not found in the anterioror posterior horns. It consists of a vascular network derived from the pia 2«C2 THE NERVOUS SYS1 EM mater, and especially from that part of it en
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The anatomy of the nervous system, from the standpoint of development and function . cation of the chorioid plexus of the lateral ventricle. The chorioid plexus of the lateral ventricle (Figs. 183, 184. 188) is continuouswith that of the third ventricle at the interventricular foramen, from whichpoint it can be followed backward through the central part into the inferiorhorn. It is coextensive with the chorioid fissure and is not found in the anterioror posterior horns. It consists of a vascular network derived from the pia 2«C2 THE NERVOUS SYS1 EM mater, and especially from that part of it enclosed in the transverse fissure andknown as the tela chorioidea of the third ventricle. It is covered throughout Body of corpus callosum.Lamina of septum pdlucidum Longitudinal fissun of cerebrum Anterior horn of lateralventricle Corpus striatumInterventricular for. Columns of fornix C( ntral portion of lateral ventricle Internal cerebral veins Clwrioid vein Chorioid arlcrv Inferior horn oflateral ventricle Collateral trigone , •Posterior horn ? Calcar a Great cerebral vein. ., -Cavity of sept, pdlucidum Lamina of septumS pellucid urn ]< in of septumpellucid um - Terminal vein Thalamus -?Corpus striatumLateral chorioid ? plexus ? Tela chorioideaof third ventricle Chorioid glomus Hippocampal Body of corpus Body of fornix Crura of fornixcom missure callosum Fig. 184.—Dissection of the human brain to show the tela chorioidea of the third ventricleand the hippocampal commissure. The body of the corpus callosum and the fornix have beendivided and reflected. Dorsal view, except that the ventral surfaces of the reflected corpuscallosum 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 TELENCEPHALONThere are four deeply placed masses of gray matter within the hemisphere, known as the caudate, lentijorm and amygdaloid nuclei, and the cla