Licence: Public Domain Mark
Credit: The senses and the intellect / by Alexander Bain. Source: Wellcome Collection.
Provider: This material has been provided by The University of Glasgow Library. The original may be consulted at The University of Glasgow Library.
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![OF THE NERVOUS SYSTEM. Fio. 4.* part of their extent hy a fissure, named the gi’eat longitudinal fissure, which is seen on the upper surface of the brain, and partly also on its base. ‘ The cerebral hemispheres are not plain or uniform upon ! the surface, but are moulded into numerous smooth and • tortuous eminences, named convolutions, or gyri, which are j marked off from each other by deep furrows, called sulci, or , anfractuosities. These convolutions are coloured externally; for the surface of the cerebral hemispheres, imlike the parts hitherto described, is composed of grey matter.’—Quain, Vol. , II., p. 451. I i * Shows the under surface or base of the encephalon freed from its j membranes. A, Cerebrum, /, y, h, Its anterior, middle, and posterior ; lobes. B, Cerebellum. C, Pons Varolii. D, Medulla Oblongata, d, Pe- 1 duncle of cerebrum. 1 to 9, indicate the several pairs of cerebral nerves, ] numbered according to the usual notation, viz. 1, Olfactory nerve. 2, ] Optic. 3, Motor nerve of eye. 4, Pathetic. 5, Trifacial. 6, Abducent j nerve of eye. 7, Auditory, and 7', Facial. 8, Glosso-pharyngeal. 8', Vagus, j 8'', Si inal accessory nervo. 9, Lingual or hypoglossal nerve. j](https://iiif.wellcomecollection.org/image/b2491762x_0054.jp2/full/800%2C/0/default.jpg)