On secondary and tertiary degenerations in the spinal cord of the dog : a preliminary communication / by Charles S. Sherrington.

  • Sherrington, Charles Scott, Sir, 1857-1952.
Date:
[1885]
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Licence: Public Domain Mark

Credit: On secondary and tertiary degenerations in the spinal cord of the dog : a preliminary communication / by Charles S. Sherrington. Source: Wellcome Collection.

Provider: This material has been provided by UCL Library Services. The original may be consulted at UCL (University College London)

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    ON SECONDARY AND TERTIARY DEGENERATIONS IN THE SPINAL CORD OF THE DOG. A prelimi- nary communication. By CHARLES S. SHERRINGTON, M.B, Cantab., George Henry Leaves Student (Plates IV., V.) Apology for the bare and fragmentary character of the following statement may lie in its preliminary nature. I must thank the kindness and liberality of Professor Goltz for the greater part of the material used in the anatomical portion of the inquiry. Up to the present time the extent of that region of the cerebral cortex of the dog, injury to which gives rise to degeneration of the pyramidal tract, has not been experimentally determined. Of the posterior limit even in man Flechsig^ can only say die hintere Grenze lasst sich nicht genau angeben. My material puts the anterior boundary at the anterior boundary of the anterior sigmoid gyrus and at a cross line drawn from the top of the suborbital fissure inwards to the great longitudinal fissure at about right angles to this latter. The lateral boundary seems to lie farther outward from the mid-line than the anterior supra-sylvian fissure. As to the pos- terior boundary, degeneration of the pyramidal tract may follow a cortical destruction not reaching further forward than a vertical drawn from the most posterior point of the ecto-sylvian fissure. The inconstant position of this fissure lessens its value as a landmark, but it is difficult to find any good landmark, the relative nearness of the crucial sulcus itself to the most anterior and most posterior points of the hemisphere varying in different dogs. It seems that the field of cerebral cortex, destructions in which cause degenerations of the pyramid, although anteriorly fairly conterminous with the region of the so-called motor centres, extends posteriorly beyond them, at least beyond the hindmost marked by Hitzig or Landois; and includes at least in part the region dedicated by Ferrier to sensory centres. Flan des menscldichen Gehints. PH. VI. 14