The anatomy of the nervous system, from the standpoint of development and function . tic tract forms a band of lighter color, known as the diagonalgyrus of the rhinencephalon or the diagonal band of Broca (Fig. 197). Thiscan be followed on to the medial surface of the hemisphere, where it is continuedas the paraterminal body or subcallosal gyrus (Fig. 200). Rostral to this gyrusthe hippocampal rudiment, which corresponds in part to the parolfactory areaof Broca, extends as a narrow band from the rostrum of the corpus callosumtoward the medial olfactory gyrus. In those mammals which possess an
The anatomy of the nervous system, from the standpoint of development and function . tic tract forms a band of lighter color, known as the diagonalgyrus of the rhinencephalon or the diagonal band of Broca (Fig. 197). Thiscan be followed on to the medial surface of the hemisphere, where it is continuedas the paraterminal body or subcallosal gyrus (Fig. 200). Rostral to this gyrusthe hippocampal rudiment, which corresponds in part to the parolfactory areaof Broca, extends as a narrow band from the rostrum of the corpus callosumtoward the medial olfactory gyrus. In those mammals which possess an espe-cially rich innervation of the nose and mouth, the region of the anterior per-forated space is marked by a swelling, sometimes of considerable size, called 268 THE NERVOUS SYSTEM the tubcrculum olfactorium. According to Retzius, a small oval mass is presentin the anterior perforated substance of man immediately adjacent to the ol-factory trigone, which represents this tubercle. Olfactory bulb Anterior commissureinterior perforated substance?A mygdaloid nucleusPyriform area. Fig. 199.—Ventral view of a sheeps brain, pyriform area shaded and anterior commissure exposed. The Pyriform Area.—The lateral olfactory gyrus is continuous at its caudalextremity with the hippocampal gyrus (Figs. 197. 198). and the two togetherform the pyriform area or lobe (Tig. 199). In the adult human brain it is moredifficult to demonstrate the continuity of these parts. As the temporal lobe is Hippocampal rudiment -vCorpus callosumSeptum pellucidum -FornixAnterior commissure.
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectnervoussystem, bookye
