On the convolutions of the human brain

9781231303665: On the convolutions of the human brain

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1873 Excerpt: ...Ascending parietal convolution. Turner. Postero-parietal gyrus. Huxley. From this convolution, which bounds the Central fissure posteriorly, and comes into relation with the anterior Central convolution at the upper and lower ends of the same, the convolutions of the Parietal Lobe pass posteriorly, the grouping of which is first limited by the following sulci: 2. Sulcus Interparietalis. 'Scheitelfurche ' (ip). sulcus inter parictalis. Syn. Sulcus parietalis. Pansch. Intra-parietal fissure. Turner.1 This sulcus, although it exhibits a very constant presence as well in the brain of apes as in that of man, and is but seldom omitted in the numerous figures of the brain just mentioned, has, nevertheless, been described only by Pansch and Turner as an important and typical fissure, and under an especial name.2 This sulcus takes an oblique course from before backwards through the Parietal Lobe, which it divides into two subdivisions--an upper, or mesial, and an inferior, or lateral, Parietal lobule, Lobulua Parietalis superior et inferior (P, and P2). The sulcus, which is already recognisable in the brain of a foetus at the sixth month, begins close over the posterior ramus of the Sylvian Fissure, being separated from the latter by the arch-like convolution 1 Turner. 'Notes more especially on the Bridging'Convolutions, &c.' p. 4. 'The Convolutions of the Human Cerebrum Topographically Considered,' p. 12. 2 BischofF (loc. cit. s. 20) admits, it is true, that this fissure is present and typical in the foetus, but disputes the importance ascribed by others to its persistence in the adult. Fig. 2,--View Of The Brain From Above. F. Frontal Lobe. P. Parietal Lobe. O. Occipital Lobe. S, End of the horizontal ramus of the Fissure of Sylvius. c. Central Fissure. A. Ant...

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