Results of hemisection of the spinal cord in monkeys / by Frederick W. Mott ; communicated by Professor Schäfer.
- Frederick Walker Mott
- Date:
- 1892
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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![Left arm and leg paralyzed completely. Pupils equal, both react equally to light and accommodation. Wound healed all along by first intention. Sensation. Priehing with a Needle.—The animal exhibits evidence of feeling on both sides. Chps.—Placed on the palmar and plantar surfaces of the left side produced no effect upon the animal, and although each limb was placed close to the ifight hand, no attempt was made by the animal to remove the clips. When tranferred to similar points upon the right side they were immediately removed. Knee-jerks exaggerated upon both sides. 4th day.—Descent of the diaphragm on the left side produces a much stronger impulse against the finger, in fact it is nearly as strong as the right. Sensation.—Pricking the root of the tail produced facial evidence of feeling on both sides, more marked on the non-paralyzed side. No reaction elsewhere, although usually obtained in a healthy Monkey. Hot water, in a test-tube, applied to the plantar surface of the foot, caused the animal to show signs of feeling on both sides. Clip Test.—The same as yesterday, except that after a considerable delay it was removed from the left hand; possibly it saw the clip. Frequent bilateral associated movement of left leg in struggling to get free, this was never noticed in the arm. Temperature, right popliteal space 100° „ left „ „ 97° 12th day.—The animal in very much the same condition except that there is more associated move- ment of the left leg. 29th day.—The animal can stand and moves left leg, flexing and extending all the joints. The knee- jerk is absent on the paralyzed side. No movement of arm and hand noticed. Sensation.—Hot water test responds on both sides. To the prick of a needle the animal seems to be slightly hyperoesthetic on paralyzed side. Clip test.—The clip is removed after delay on both sides. The animal w'as anaesthetized and the motor area of the cortex cerebri exposed on both sides. [Examination of the spinal cord in this case showed, not only the ordinary degenerations above and below the lesion, but a well marked scattered degeneration of the posterior column with the exception of the root zone extending right down the cord into the lumbai- region. The cause of this I am unable to state; there was no appearance of meningitis.—Dec. hth, 1891.]](https://iiif.wellcomecollection.org/image/b22297066_0019.jp2/full/800%2C/0/default.jpg)
