Image from page 469 of "The brain as an organ of mind" (1896)
Authors: Bastian, H. Charlton
Publisher: New York : D. Appleton and Company
Contributing Library: University of Connecticut Libraries
Digitizing Sponsor: University of Connecticut Libraries
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the giant cells areswollen and more rounded (owing to their giving ofi a larger num-ber of processes), than in such animals as the Sheep and the Pig.In the latter these cells are more simply pyramidal, and have asmaller number of inter-connecting processes. Such cells are,moreover, scattered over a wide area. But in the Cat and otl^erCarnivora, the area in which the * giant cells are found is veryrestricted—much more so than in Man and the Quadrumana,. Again, according to Bevan Lewis, a peculiar kind of globose *cell with few connecting processes, is to be found amidst the otherelements in the second and third layers of the Pig and Sheep, andalso in Apes—though such elements have been met with in Manonly in the brains of Idiots or Imbeciles. 452 THE INTERNAL STRUCTURE 4.—The Principal Commissures of the Brain. The connecting or, as Meynert terms them, the associa-tion system of fibres of the Brain belong to three principalcategories, each of which will be now briefly described.
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Fig. 1G2.—Longitudinal Section through the centre of the Brain, showing theinner face of Left Cerebral Hemisphere. (Sappey, after Hirschfeld.) 1, SpinalCord ; 2, Pons Varolii; 3, Cerebral Peduncle ; 4, Arbor Vita? of cut surface ofMiddle Lobe of CereV>ellum ; 5, Sylvian aqueduct; 6, Valve of Vienssens ; 7, Corporaquadrigemina; 8, Pineal body ; 9, its inferior peduncle ; 10, its eupeiior peduncle;11, middle portion of the great Cerebral Cleft; 12, upper face of the Tlialamus ;13, its internal face, forming one of the walls of the middle or Ihird ventricle;13, Grey or Middle Commissure; 14, Choroid plexus; 15. Pituitary pedicle;16, Pituitary body ; 17, Tuber cincreum ; 18, Mammillary body ; 19, interpeduncxdarperforated lamella; 20, third or common Oculo-motor nerve; 21, Optic Nerve;22, Anterior Commissure; 23, Foramen of Monro; 24, section of the Cerebraltrigone ; 25, Septum lucidum ; 26, Corpus Callosum ; 27, its posterior extremity or bourrelet ; 28, its anterior extremity or ge
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