Results of hemisection of the spinal cord in monkeys / by Frederick W. Mott ; communicated by Professor Schäfer.

  • Mott, F. W. (Frederick Walker), 1853-1926.
Date:
1892
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Licence: Public Domain Mark

Credit: Results of hemisection of the spinal cord in monkeys / by Frederick W. Mott ; communicated by Professor Schäfer. 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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    I. Results of Hemisection of the Spinal Cord in Monkeys. By Feedeeick W. Mott, M.D., B.S., M.R.C.P. Communicated hy Professor Schafee, F.R.S. Received June 1,—Read June 18, 1891. [Plates 1-4.] While engaged in studying experimentally the connections of the ceUs of Claeke’s column ■with the ascending tracts of the spinal cord in the Monkey, I was surprised' to find that after hemisection in the lower dorsal region, the sensory disturbances produced in no way corresponded with those already obtained by an eminent observer. I was, therefore, led to continue my experiments, with the aid of a grant from the British Medical Association, and by the kind permission of Professor ScHAFEE I carried them out in the Physiological Laboratory of University College. My thanks are also due to him for much valuable advice and assistance. The subject is one of great importance from a scientific as well as from a clinical point of view. Some years ago a case occurred in my practice which tended to shake my faith in the absolute truth of the doctrine of complete and immediate decussation of sensory impulses in the spinal cord, as taught by Beown-Sequaed. The experiments which I have performed exhibit the following principal points of interest:— 1. Eeturn of associated movements after complete destruction of the crossed pyramidal tract below the lesion. 2. That all sensory impulses do not decussate in the cord ; in fact, they appear to show that certain sensory impulses, e.g., touch, the muscular sense, and localization in space, pass chiefly up the same side, painful impressions up both sides. A peculiar condition known as “ allochiria ” occurs after hemisection. 3. The vaso-motor disturbances are on the same side as the lesion, and consist of MDCCCXCII.—B. B 28,3.92,