The anatomy of the nervous system, from the standpoint of development and function . aced oval masses, or inferior lobes, a thin walled vascular outgrowth, the saccusvasculosus. Closely related to the ventral aspect of the hypothalamus is a gland-ular mass, derived by a process of evagination from the oral epithelium, andknown as the hypophysis. For a picture of this structure in the adult dogfishreference should be made to a paper on the subject by Baumgartner (1915On the ventral surface of the hypothalamus the optic nerves meet and cross inthe optic chiasma. The telencephalon includes all of
The anatomy of the nervous system, from the standpoint of development and function . aced oval masses, or inferior lobes, a thin walled vascular outgrowth, the saccusvasculosus. Closely related to the ventral aspect of the hypothalamus is a gland-ular mass, derived by a process of evagination from the oral epithelium, andknown as the hypophysis. For a picture of this structure in the adult dogfishreference should be made to a paper on the subject by Baumgartner (1915On the ventral surface of the hypothalamus the optic nerves meet and cross inthe optic chiasma. The telencephalon includes all of the brain in front of the velum transversum, 3° THE NERVOUS SYSTEM a transverse fold projecting into the third ventricle from the membranous roof(Fig. 11), and consists of a median unpaired portion, and of the two cerebralhemispheres with their olfactory bulbs. The hemispheres are the evaginatedportions of the telencephalon and are partially separated from each other by a r. ophthal. superfic. Vr. ophthal. superfic. VII n. terminalis ,r. ophthal. profundus V\Optic nerve (n. II). r. maxillaris Vr. mandib. V Supra-orbital trunk Infra-orbital trunkGanglion Vr. palatinus VIIGang, geniculi VIIGang, later. VIIr. prespirac. VII -Spiracle -r. hyomandib. VII n. IXn. X r. lateralis X r. branchialis Xr. intestinalis X Fig. 13.—Diagram of the brain and sensory nerves of the smooth dogfish, Mustelus canis,from above. Natural size. The Roman numerals refer to the cranial nerves The olfactorypart of the brain is dotted, the visual centers are shaded with oblique cross-hatching, the acoustico-lateral centers with horizontal lines, the visceral sensory area with vertical lines, and the generalcutaneous area is left unshaded. On the right side the lateral line nerves are drawn in black, theother nerves are unshaded. (From Herricks Introduction to Neurology.) median sagittal fissure, which has been to a large extent obliterated by thefusion of their median walls. The shape of the lateral vent
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectnervoussystem, bookye
