Experimental Researches Applied to Physiology and Pathology

Experimental Researches Applied to Physiology and Pathology

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1853 edition. Excerpt: ...of the nutrition of the nervous centres, by which excess of nutrition the reflex faculty becomes much increased. XX ON THE CROSSED TRANSMISSION OP IMPRESSIONS IN THE SPINAL CORD. Numerous experiments which I have performed have proved to the numerous physicians and students, who have seen the most important of them, that the impressions made on one side of the body are transmitted to the sensorium by the opposite side of the spinal cord. It is known that Galen performed two experiments, which See: De locis affectis, lib. iii. cap. ziv; or De anatomicis admonstrationibus, lib. viii. sect. 6. have been considered as demonstrating that there is no crossed action in the spinal cord.. One of these experiments of Galen consisted in the transversal section of a lateral half of the spinal marrow.. After this operation the animal was paralyzed in all the parts situated behind the section, on the same side, so that the palsy was on the right side of the body when the right side of the spinal cord was divided, and vice versa. The second experiment consisted in a longitudinal section on the middle line of the spinal cord so as to separate into two lateral halves the part of that nervous centre supplying nerves to the posterior limbs. After this operation the animal was able to walk. Galen, in these two experiments did not examine the state of the sensibility. He speaks merely of the voluntary movements. Nevertheless his researches were considered in this century as completely proving that there is no crossing of action in the spinal cord, either for sensibility or for voluntary movement. The following experiments will prove that there is a crossing of action for sensibility in that organ: 1st. If a lateral half (i. e. the posterior and the antero-lateral...show more

Product details

  • Paperback | 46 pages
  • 189 x 246 x 3mm | 100g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236643844
  • 9781236643841