Synopsis of Lectures Upon Diseases of the Nervous System
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| Hersteller: | Forgotten Books (Starr, M. Allen) |
| Stand: | 2015-08-04 03:50:33 |
Produktbeschreibung
Excerpt from Synopsis of Lectures Upon Diseases of the Nervous System: Delivered at the College of Physicians and Surgeons, Medical Department of Columbia University, New York Examples. The nervous system of a frog experimentally deprived of its hemispheres, capable of automatic acts of swimming. The automatic act of respiration in man. In man the facial, laryngeal, intercostal, thoracic, and diaphragmatic respiratory muscles act in definite succession and rhythm in the act of breathing; and this act is presided over by a single centre in the medulla controlling the lower medullary and spinal centres. The highest type of nervous system is the complex type. There are the lower centres as in the simple type. There are higher centres controlling the lower centres, as in the compound type. There is a supreme mass controlling both the others. This is the form found in all vertebrates, and the degree of evolution in the highest or supreme mass determines the place of the animal in the scale of intelligence. In man the supreme mass is the cerebral cortex, the next lower or automatic centres are the optic thalami and basal ganglia, including gray masses in the cerebral axis; the lowest or reflex centres are the cranial nerve nuclei in the cerebral axis and the gray matter of the spinal cord segments. These distant gray masses are joined with one another in all possible combinations by means of the white nerve tracts, which pass in all directions around and within them. The human nervous system consists of a peripheral system and a central system. The peripheral system comprises all the nerves. The central system includes: First. The spinal cord and cranial nerve nuclei. Secondly. The cerebellum; gray masses of the medulla, pons, and crura cerebri; corpora quadrigemina, optic thalami, and corpora striata. Thirdly. The cerebral cortex. 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.
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