On out-lying nerve-cells in the mammalian spinal-cord / by C.S. Sherrington ; communicated by M. Foster.

  • Sherrington, Charles Scott, Sir, 1857-1952.
Date:
1890
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Licence: Public Domain Mark

Credit: On out-lying nerve-cells in the mammalian spinal-cord / by C.S. Sherrington ; communicated by M. Foster. Source: Wellcome Collection.

Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.

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    adding that such cells probably exist not merely in the lumbar region but In other regions as s^ell. My own preparations confirm the description of Schiefferdelker. In them the cells are like arrow-heads In shape; one of the cell-processes, occasionally two, disappears into fibre-bundles in a direction toward the adjacent gi’ey horn, and one process is directed toward the bottom of the ventral fissure, as if to pass with medullated nerve-fibres into the white commissure. One cell process may project, as, for instance, in fig. 2, in a median direction, neither toward the grey cornu nor the white commissure. This may pass into a fibre-bundle lying further ventrally than tiiat which contains the pai-ent cell, and in that may turn either toward the grey cornu, or, and more proljably, toward tlie white commissure. It is to be I'emembered, however, that the direction at first taken l)y it is the same as that of numerous bundles of fine medullated fibres vdiich radiate into the anterior white column from the ventral part of the mesial boi'der of the ventral cornu, as if to reach the angle of white matter forming the lij) of the ventral fissure. I have found the cells in the cervical as well in the lumbar region of the cord. It is difficult not to think that these isolated cells as in the anterior column are connected with the fibres among which they lie. Most of these appear certainly to pass between the mesial portion of the ventral horn and the opposite side of the cord in the wliite commissure. In bundles starting from the cornu further ventrally, it is not us\ial in one and the same section to see that the bundles pass actually into the commissure, although they slant in the required direction. It is possible that they take a longitudinal course within the white column. The view of Bidder' and his pupilst that the fibres of the white commissure run to nerve-cells in the ventral cornu, although ojqiosed by Stilling^ and untrue in the sense in which Gerlacii^ advocated it, has much in its favour. In the white commissure are collected together fibres from and for manifold end-stations, and that some of these fibres are of the kind described by Bidder is rendered all the more ])robable by the ja-esence of the outlying cells above-mentioned. Out-bjiny GanyUon-Cells in the Lateral Column. The }'emarkable group of nerve-cells discovered by Berger|| in the cord of Alligator and allied forms still remains, so far as I am aware, an unexplained fact. I have, as already stated, never seen any unequivocal trace of it in the Mammalian cord. It may 1)6 that a vestige of it does really exist in the shape of a thickened rib in the sub-pial * 111 a letter to R. Waoniui in I851-. See Wagner’s ‘Neurolog. Untersnehungen,’ 1854. t Kui'Feer, ‘ De Meditliae Spinalis Textura in Ranis,’ 1854, p. 30; Ows.iannikow, ‘ Disq. Microsc. (le i\leil. Spin, textnr. iinjirimis in Piscibns I'act.,’ 1854, p. 3(3. f ‘ Ncuo Uiiter.siicli. ii, d. Ban des Ruckeiinuirks,’ 1859; also Ekoaimann, ‘ ITntersucli. ii. d. Normal. Ariat. dc.s Riickenmarks,’ 18(34 and 1867. § Stricker’s ‘ Handbncli,’ vol. 2. II “Ueber ein eigentliiimliclies Kuekenmark.s band einig'er Reptilicn mid Anipbibieu.” ‘ Sitzungsb. tier Mat. Class, dor Kaiserlicb. Akadeniie zii Wien,’ Eub., 1878. E 2