University Of California Publications In Physiology

Author : S. S. Maxwell
Publisher : Forgotten Books
ISBN 13 : 9780332321684
Total Pages : 174 pages
Book Rating : 4.3/5 (216 download)

DOWNLOAD NOW!

Download or read book University of California Publications in Physiology, 1910-1915, Vol. 4 (Classic Reprint) written by S. S. Maxwell and published by Forgotten Books. This book was released on 2017-12-12 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from University of California Publications in Physiology, 1910-1915, Vol. 4 These theories seemed to receive very strong experimental sup port from the work of Lee1 on the ear of the shark. Lee studied and described with great accuracy the compensatory movements made by the eyes and fins when the animal is rotated about the various axes of the body. Rotation around a dorso-ventral axis in a clockwise direction causes the eyes to be turned to the left. When the animal is rotated around a longitudinal axis so as to be inclined to the right, the right eye is elevated and the left eye is depressed. If the body is turned around a transverse axis so as to incline the head downward, the two eyeballs appear to turn their visual axes so that the anterior angle of each eye is elevated and the posterior angle depressed; that is to say, the eyes are rotated backward around their visual axes. Rota tion around the same axis but inclining the head upward causes the eyes to rotate forward around their visual axes. If the rotation is around an obliquely placed horizontal axis the eye movements are in a corresponding plane; for example, if the animal is held with the head inclined downward and to the right, that is, rotated in the plane of the right anterior and left posterior canals, the right eye is elevated and the left eye depressed, but both eyes are rotated backward around their visual axes. If the animal is rotated around the last mentioned axis but into such position that the head is elevated and inclined to the left, the right eye is depressed, the left eye elevated, and both are rotated forward on their visual axes. All the above described compensatory movements tend to preserve for the eyes the positions in space which they held before the change in position which called them forth. Cor responding movements of the fins occur, and these movements are such as would when combined with the ordinary swimming motions tend to return the body to its original orientation in space. That these movements depend upon some structure in the car had previously been proved by Loeb,2 who found that they disappeared permanently after section of both auditory 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.