. The brain as an organ of mind. Brain; Thought and thinking; Brain. 452 TPIE INTERNAL STRUCTURE 4.—The Principal Commissures of the Brain. The comiecting or, as Meynert terms them, the ' associa- tion system ' of fibres of the Brain belong to three principal categories, each of which will be now briefly Fig. 162.—Longitudinal Section through the centre of the Brain, showing the inner face of Left Cerebral Hemisphere. (Sappey, after Hirschfeld.) ], Spinal Cord ; 2, Pons Varolii; 3, Cerebral Peduncle ; 4, ' Arbor Vitge' of cut surface of Middle Lobe of Cerebellum ; 5, Sylvian aquedu
. The brain as an organ of mind. Brain; Thought and thinking; Brain. 452 TPIE INTERNAL STRUCTURE 4.—The Principal Commissures of the Brain. The comiecting or, as Meynert terms them, the ' associa- tion system ' of fibres of the Brain belong to three principal categories, each of which will be now briefly Fig. 162.—Longitudinal Section through the centre of the Brain, showing the inner face of Left Cerebral Hemisphere. (Sappey, after Hirschfeld.) ], Spinal Cord ; 2, Pons Varolii; 3, Cerebral Peduncle ; 4, ' Arbor Vitge' of cut surface of Middle Lobe of Cerebellum ; 5, Sylvian aqueduct; 6, Valve of Vieussens ; 7, Corpora quadrigemina; 8, Pineal body ; 9, its inferior peduncle ; 10, its supeiior peduncle ; 11, middle portion of the great Cerebral Cleft; 12, upper face of the Thalamus; 13, its internal face, forming one of the walls of the middle or third ventricle ; 13', Grey or Middle Commissure; 14, Choroid plexus; 15, Pituitary pedicle; 16, Pituitary body ; 17, Tuber cinereum ; 18, Mammillary body ; 19, interpeduncular perforated lamella; 20, third or common Oculo-motor nerve; 21, Optic Nerve; 22, Anterior Commissure; 23, Foramen of Monro; 24, section of the Cerebral trigone ; 25, Septum lucidum ; 26, Corpus Callosum ; 27, its posterior extremity or ' bourrelet ; 28, its anterior extremity or 'genu '; 29, 30, Gyrus fornicatus, or Con- volution of the Corpus Callosum; 31, Anterior part of Marginal Convolution; 32, Calloso-marginal sulcus ; 33, Occipital Convolutions ; 34, ' internal jDerpendicular fissure' separating Occipital from Parietal Lobe. These fibres are of great importance, and so numerous, that, Broadbent says,^' " the radiating fibres must bear a * " Journ. of Ment. Science," Ap. 1870, p. 9. i. 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 Bastian, H. C
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectbrain, booksubjecttho
