The anatomy of the nervous system, from the standpoint of development and function . rated by acleft-like interval, the cavity of the septum pellucidum (Fig. 177). Each lamina TIIK KlIINK.\(i:iHAI.().\ 273 forms part of tin- medial wall of the corresponding hemisphere <li,^r. 182); andtin- cavity, although sometimes called tin- fifth ventricle, develops as a cleft within the lamina iciniinalis and, therefore, bears no relation to the true brainventricles, which are expansions of the original lumen of tin mural tube (). The anterior commissure, like the hippocampal commissure, belongs
The anatomy of the nervous system, from the standpoint of development and function . rated by acleft-like interval, the cavity of the septum pellucidum (Fig. 177). Each lamina TIIK KlIINK.\(i:iHAI.().\ 273 forms part of tin- medial wall of the corresponding hemisphere <li,^r. 182); andtin- cavity, although sometimes called tin- fifth ventricle, develops as a cleft within the lamina iciniinalis and, therefore, bears no relation to the true brainventricles, which are expansions of the original lumen of tin mural tube (). The anterior commissure, like the hippocampal commissure, belongs to therhinencephalon. It is a rounded fascicle which crosses tin- median plane in thedorsal part of the lamina terminalis just rostral to the columnae fornicus (). In a frontal section of the brain, like that represented in Fig. 1X7, it can Splenium of corpus callosumSulcus cinguli Parieto-occipiial f CumusCalcarine \Jissure . Body of fornix Body of corpus callosum Free portion of col. of fornixSeptum piiha \ilumInter vent, nlerior commiss. Genu of corpuscallosum. Occipita-lobe Cms of fornix Thalamus m^ Fimbria of hippocampusDentate fascia of liippocampu Mammillothalamic tract Uncus OlfactorybulbOlfactory tradRostrum of corpus col.\ \ Rostral lamina Optic nerve Covered portion of column ofMammillary body fornix Fig. 205.—Dissection of the human cerebral hemisphere to show the fornix. Median view. (Sobotta-McMurrich.) be traced lateralward through the most ventral part of the lentiform consists of two parts (Fig. 206). Of these, the more rostral is shaped like ahorseshoe and joins together the two olfactory bulbs. This part can be readily-dissected out in the sheeps brain (Fig. 199), but is poorly developed in man. Theremaining portion, and in man the chief component, joins the pyriform areasof the two hemispheres together (Cajal, 1911). We are now sufficiently acquainted with the anatomy of the rhinencephalonto undertake a study of the structure an
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectnervoussystem, bookye
