A Study of the Knee Jerk PDF ePub eBook

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A Study of the Knee Jerk free pdf Excerpt from A Study of the Knee Jerk The knee jerk is immediately caused by the sudden and vigorous contraction of the quadriceps muscle of the thigh. The quadriceps is the great extensor muscle of the leg, forming a large fleshy mass, which covers the front and sides of the femur. Sherrington has demonstrated by experimentation upon animals that two of its four divisions, the vastus internus, covering the inner surface of the femur, and the crureus, covering the front of the femur, are chiefly involved in the knee jerk mechanism. These two portions are so intimately blended anatomically as to form a single muscle. So considered it is related by its superficial surface with the psoas and iliacus, the rectus, satorius, pectineus, adductors, and fascia lata- by its deep surface with the femur, sub-crureus, and synovial membrane of the knee joint. The tendons of the different portions of the quadriceps unite at the lower portion of the thigh, so as to form a single strong tendon which invests the patella throughout its whole surface except underneath where a free articular surface is presented, and continues downward to be inserted in the rough bony prominence of the tibia. From the lower border of the patella to the insertion in the tuberosity of the tibia it is known as the ligamentum patellae. The patella may therefore be properly regarded as a sesamoid bone, developed in the tendon of the quadriceps and the ligamentum patellae. Immediately below the lower edge of the patella one-half inch to an inch - the tendon passes over a slightly hollowed space in the parts beneath. The nervous structures involved in the knee jerk mechanism have also been determined with exactness. Sherrington 1 has located the position of both the afferent and efferent conduction paths. He found the afferent path to lie in the posterior root of the fifth lumbar of the Rhesus monkey, which corresponds to the fourth of man. This posterior root receives afferent fibers from the obturator and anterior crural nerves, and from the external and internal popliteal nerves. 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 Edwin B Twitmyer

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Details Book

Author : Edwin B Twitmyer
Publisher : Forgotten Books
Data Published : 27 September 2015
ISBN : 1332000665
EAN : 9781332000661
Format Book : PDF, Epub, DOCx, TXT
Number of Pages : 46 pages
Age + : 15 years
Language : English
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  • A Study of the Knee Jerk free pdfA Study of the Knee Jerk

    Sites To Download Books. Excerpt from A Study of the Knee Jerk The knee jerk is immediately caused by the sudden and vigorous contraction of the quadriceps muscle of the thigh. The quadriceps is the g