Handbook of the diseases of the nervous system / by James Ross.

  • James Ross
Date:
1885
Catalogue details

Licence: Public Domain Mark

Credit: Handbook of the diseases of the nervous system / by James Ross. Source: Wellcome Collection.

Provider: This material has been provided by King’s College London. The original may be consulted at King’s College London.

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    the convolutions of the other. It consists of bundles of nerve fibres, almost the whole of which pass transversely between the two hemisphere . although a few fibres run longitudinally on its surface, named the stria- longitudinales or nerves of Lancisi. A horizontal section nearer to the base of the brain reveals the basal ganglia and the internal capsule, as represented in Fig. 11. A systematic nomenclature of the various parts of the centrum ovale has been devised by Pitres. His system consists in making vertical sections of the brain at definite points, and naming the various parts of the medullary substance exposed in each section. A vertical section of the hemisphere at right angles to its longitudinal axis in the prefrontal region gives the prefrontal section (Fig. 12). The next section is made Fig. 12. Prefrontal Section. (After Pitres.) 1, 2, 3, First, second, and third frontal convolutions. 4, Orbital convolutions. 5, Convolutions.on the internal aspect of the frontal lobe. 6, Prefrontal fasciculi of the centrum ovale. two centimetres in front of the fissure of Rolando and passes through the bases of the three frontal convolutions, and is named the pedunculo- frontal section (Fig. 13). The medullary substance in this section is subdivided into a superior, middle, and an inferior pedunculo-frontal fasciculus, corresponding with the respective frontal convolutions. The next section is made through the ascending frontal convolution, parallel with the fissure of Rolando, and is named the frontal section. It also passes through a small portion of the sphenoidal lobe. The medullary substance of this section is also subdivided into superior, middle, and inferior frontal fasciculi (Fig. 14). The fourth section is carried through the ascending parietal convolution, and is named the parietal section. It is subdivided into superior, middle, and inferior