The Graphic Recording of Reflexes, Clonus, and Tremors

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Excerpt from The Graphic Recording of Reflexes, Clonus, and Tremors: A Thesis Submitted to the Faculty of the Graduate School of the University of MinnesotaAs a routine practice in recording knee jerks, we make three records of each limb, starting with the left: first the knee jerk, then the knee jerk doubly reinforced, and then a voluntary swing representing as nearly as possible the swing produced by the re¿ex. The greater care has to be used in securing the normal re¿ex to have the patient in as easy and comfortable 3 position as possible, with the eyes closed and the thoughts diverted from the re¿ex problem. Early in our work we found that the patient, being on the qui vive, and the operator of the galvanometer saying Now when ready, pro duced a reinforcement or increase of the re¿ex. Since then the operator signals by raising the hand when ready. In securing the reinforced knee jerk, a double reinforcement _is used. The subject watches the hammer drop and, the mo ment it is released, pulls quickly. This rein forcement in most cases produces a marked in crease in the electrical re¿ex Fig. 6 though in some subjects it has more of an inhibitory effect on the mechanical, the subject holding the muscles tense.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis 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.