366 



NERYOUS SYSTEM. 



extends thence along the inferior horn of the lateral ventricle 

 to its end in the temporal lobe. It is somewhat narrower at 

 its lateral end. It is thus curved into a semicircle in conformity 



FIG. 149. CAUDAL SURFACE OF FIG. 150. CAUDAL SURFACE OF 



TRANSVERSE SECTION OF BRAIN TRANSVERSE SECTION OF BRAIN 



THROUGH THE GENU OF THE THROUGH THE OPTIC CHIASMA 



CORPUS CALLOSUM. AND THE REGION OF THE INTER- 



VENTRICULAR FORAMEN (FORA- 

 MEN OF MONROE). 



Fig. 149. Gray matter dotted; white matter with a few lines. I, right hemi- 

 sphere; 2, left hemisphere, a, corpus callosum, section through genu and rostrum; 

 b, cavity of lateral ventricles. 



Fig. 150. I, right hemisphere; 2. left hemisphere, 0, corpus callosum; b, for- 

 nix (cut); c, cavity of lateral ventricles; d, fimbria (d', cut surface; d, caudal uncut 

 surface of the part that curves ventrad); e, pillars of fornix; /, anterior commissure; 

 g, parts of thud ventricle; h, optic chiasma; z, parts of corpus striatum. 



FIG. 151. CAUDAL SURFACE OF TRANSVERSE SECTION OF THE BRAIN THROUGH 

 THE TUBER CINEREUM AND INFUNDIBULUM, CKANIAD OF THE HYPOPHYSIS. 



, corpus callosum; b, fornix (continuous at the sides with the hippocampus); c, 

 cavity of lateral ventricles: d, hippocampus; e, choroid plexus of the third ventricle 

 (roof of the diencephalon); f, dorsal part of cavity of the third ventricle; g, section 

 of thalamus; h, massa intermedia of the thalami, dividing the third ventricle into a 

 dorsal (/) and a ventral (i) portion; z, ventral part of third ventricle; /, part of optic 

 tracts; k, thin wall of infundibulum, with part of cavity of third ventricle; /, line 

 separating roof of thalamus (diencephalon) from floor of hemispheres (telencephalon). 



with the inferior horn of the ventricle. Its dorsal surface is 

 convex and looks into the lateral ventricle ; its ventral surface 

 is concave and rests upon the thalamus and the optic tract. 



