. Elementary text-book of zoology. Zoology. MO FIG. 577.—a. Brain and anterior part of the spinal cord of a human embryo seen from the side (after Kolliker). Vh, Fore-brain; Zh, thalamencephalon; Mh, mid-brain: Hh, hind-brain; Nh, medulla oblongata; T, anterior ventral end of the thalamencephalon ; NO, optic nerve. 1. Diagrammatic longitudinal section through a vertebrate brain (after Huxley). Hs, Hemispheres; LO, olfactory lobes ; Olf, olfactory nerve; ThO, optic thalamus; T7, third ventricle; No, optic nerve; H, pituitary body (hypophysis); Gp, pineal gland; CQ, corpora quadrigemina; Cb, cer
. Elementary text-book of zoology. Zoology. MO FIG. 577.—a. Brain and anterior part of the spinal cord of a human embryo seen from the side (after Kolliker). Vh, Fore-brain; Zh, thalamencephalon; Mh, mid-brain: Hh, hind-brain; Nh, medulla oblongata; T, anterior ventral end of the thalamencephalon ; NO, optic nerve. 1. Diagrammatic longitudinal section through a vertebrate brain (after Huxley). Hs, Hemispheres; LO, olfactory lobes ; Olf, olfactory nerve; ThO, optic thalamus; T7, third ventricle; No, optic nerve; H, pituitary body (hypophysis); Gp, pineal gland; CQ, corpora quadrigemina; Cb, cerebellum; MO, medulla oblongata ; P V, pons Varolii. and structure presented by the brain, three principal regions which correspond to the three vesicles found in the embryo can always be distinguished (fig. 576). The anterior vesicle (fore-brain, fig. 576, Vh} corresponds to the cerebral hemispheres and the optic thalami (fig. 577, Hs, ThO), the middle vesicle (mid-brain, Mh) to the corpora quadri- gemina (fig. 577, C Q), and the posterior vesicle (hind-brain, fig. 576, flh) to the cerebellum and medulla oblongata (fig. 577, Cb, MO). The anterior vesicle, however, is again divided into two parts—an anterior bilobed part, which constitutes the cerebral hemispheres and contains the lateral ventricles, and a posterior unpaired part which constitutes the so-called thalamencephalon with the thalami optici and the parts surrounding the third ventricle (fig. 577). The third cerebral vesicle is also divided into two parts—anteriorly the cerebellum, and pos- teriorly the medulla 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 Claus, Carl, 1835-1899; Sedgwick, Adam, 1854-1913; Sinclair, F. G. (Frederick Granville), b. 1858. New York : Macmillan
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectzoology, bookyear1884
