. Mammalian anatomy : with special reference to the cat . Mammals; Anatomy, Comparative; Cats. THE NERVOUS SYSTEM. 183 These cavities within the central nervous system result from the manner in which the brain and cord are formed. In the embryonic life of most vertebrates the nervous system appears as a trough of matter extending dorsally. Fig. 95. Sagittal Section of the Brain. ac, Anterior commissure; av, arbor vitae; c, habena; cc, canalis centralis; cb, cerebellum; cm, middle commissure or massa intermedia; cr, sulcus crucialis; cpq, corpus quadrigemina; ex, choroid plexus of third ventric
. Mammalian anatomy : with special reference to the cat . Mammals; Anatomy, Comparative; Cats. THE NERVOUS SYSTEM. 183 These cavities within the central nervous system result from the manner in which the brain and cord are formed. In the embryonic life of most vertebrates the nervous system appears as a trough of matter extending dorsally. Fig. 95. Sagittal Section of the Brain. ac, Anterior commissure; av, arbor vitae; c, habena; cc, canalis centralis; cb, cerebellum; cm, middle commissure or massa intermedia; cr, sulcus crucialis; cpq, corpus quadrigemina; ex, choroid plexus of third ventricle—the dark line dorsad of ex is the velum inter- positum; /, sulcus splenialis; fr, frontal lobe of cerebrum; fn, an- terior pillars of the fornix; in, infundibulum; it, iter, or aqueduct of Sylvius; k, genu of corpus callosum; liux, lamina terminalis; m, splenium ; mr, sulcus marginalis ; med, medulla ; op, optic chiasm ; oc, occipital lobe; ol, olfactory lobe; pn, pineal gland; po, pons Varolii; pc, posterior commissure; pv, inferior medullary velum; pvv, superior medullary velum or valve of Vieussens; 3 and 4, third and fourth ventricles. throughout the length of the body. The sides of this trough grow dorso-mediad, thus forming a roof and there- by converting the trough into a canal which in the spinal cord becomes the canalis centralis, and in the brain the ventricles. This continuous cavity of the central nervous system contains a fluid having the nature of lymph. The Commissures of the Brain.—The paired portions of the brain are united across the median line by bands of. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Davison, Alvin, 1868-1915. Philadelphia : P. Blakiston
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectmammals, bookyear1910
