Architecture of the brain / by Wm. Fuller.

  • Fuller, Wm. (William), 1842-
Date:
1896
Catalogue details

Licence: Public Domain Mark

Credit: Architecture of the brain / by Wm. Fuller. Source: Wellcome Collection.

Provider: This material has been provided by the Augustus C. Long Health Sciences Library at Columbia University and Columbia University Libraries/Information Services, through the Medical Heritage Library. The original may be consulted at the the Augustus C. Long Health Sciences Library at Columbia University and Columbia University.

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    duced u]3on memory, mind and action by the destruction of a nerve centi'e, or the interruption of any of these tracts by accident or disease. The internal layer of the corona radiata is that next to and including the crest or decussation of the corpus callosum and internal capsule. This layer of the corona lies close to the walls of the lateral ventiicle previous to its distribution. External to this layer, the fibres of the several layers are mingled into a network, the formatio reticularis of the cere- brum. The internal layer is composed wholly of fibres from the corpus callosum and the internal capsule, and as they pass toward the sui'face of the brain are disposed in horizontal laminae between which the fibres of the longitudinal commis- sures are inserted in their passage from before backwards. The outermost layer of the corona radiata is a close network of fibres passing in all directions and therefore in dissection breaks into short pieces immediately beneath the convolutions. The three layers of the corona may with propriety be called, from within outwards, the capsular, commissural and inter- nuntial layers. These layers are exhibited in plate No. 25 of the vertical sections. Dngitudinai com- The LONGiTUDiisrAL COMMISSURES.—The longitudinal fibres, i'or'o''comm'ir- ov commissures of the hemispheres, are probably scattered ferior°of Vor'X tlirough tho eutlro mass of the corona, but in some situations p'i'gs'^sT'g'is to they can be demonstrated with ease and the fibres separ- ated for long distances. A tract running parallel with the bottom of the fissure of Sylvius, beneath the insula, is of Mernai ionitu- cousiderablc size, and is called the external longitudinal commissure. This commissure is represented in the triangle just described, and terminates in the internal capsule in front of the lenticular body. Another commisui-e is situated in the gyrus fornicatus upon the inner side of the crest and sure. Figs. 19 20 21.