Archives of Medicine, Vol. 8 PDF ePub eBook

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Archives of Medicine, Vol. 8 free pdf Excerpt from Archives of Medicine, Vol. 8: A Bi-Monthly Journal Devoted to Original Communications on Medicine Surgery, Ans Their Special Branches Any one at all conversant with electro-therapeutics will recall the retarded, slow, vermicular contractions which galvanism excites in muscles which have been cut off for some time from the spinal cord. The peculiarity of this contraction the writer thought could be beautifully demonstrated by the myograph, and it was with the idea of imitating this condition in the animal that the following experiments were performed. In the first place normal nerve and muscle reactions were taken in healthy frogs as follows. By means of a double interrupter the circuit carrying electricity to the frog is made and broken at the same time as the circuit of the chronograph, hence the moment the electricity reaches the muscle it also reaches the chronograph and breaks the line. Having broken up the brain and spinal cord of the frog, to stop voluntary and reflex movements, the sciatic is exposed, the tendo Achillis is cut and fastened to the myograph needle, and the frog is securely pinned to the cork stage (see fig. 1), with one electrode under the nerve and the other in some indifferent point, as the small of the back. We take the tracings produced by the cathode (neg.) closure contraction, cacc, and the anode (pos.) closure or opening contraction, ancc or anoc, excited by a small Grenet cell, and afterward the reaction to the secondary current of a Dubois induction apparatus. The same process is repeated with the muscle. The sciatics of several frogs were cut and the animals were kept in a very warm room, so that nerve degeneration would not be retarded for perhaps weeks, as it sometimes is in frogs, especially in the winter. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully- any imperfections that remain are intentionally left to preserve the state of such historical works.

About E C Seguin

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Details Book

Author : E C Seguin
Publisher : Forgotten Books
Data Published : 27 September 2015
ISBN : 1330686519
EAN : 9781330686515
Format Book : PDF, Epub, DOCx, TXT
Number of Pages : 308 pages
Age + : 15 years
Language : English
Rating :

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