This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1885 Excerpt: ...This differs essentially from the other parts in that it is filled with liquid instead of air. It consists of three portions: 1st, the vestibule or entrance, Fig. 186, e; 2d, the cochlea, d; and 3d, the semicircular canals, c. On, and in these, the ultimate filaments of the auditory nerve are distributed. The vestibule ...
Read More
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1885 Excerpt: ...This differs essentially from the other parts in that it is filled with liquid instead of air. It consists of three portions: 1st, the vestibule or entrance, Fig. 186, e; 2d, the cochlea, d; and 3d, the semicircular canals, c. On, and in these, the ultimate filaments of the auditory nerve are distributed. The vestibule is the entrance to the cochlea and canals; it is represented at e, Fig. 186. Floating in the fluid with which the cavity is filled is an ovoid membranous sac, constricted at its centre; and dumb-bell like in shape. To the two divisions the names of saccule and utricle are given. It is also filled with fluid, called the endohimph; that on the outside is called /" lymph. The membranous walls of this sac receive a copious supply of nerve fibres, atul in its interior minute stony particles are found; in its entirety it resembles the otolithic sac of inferior animals. In addition to its use as the way of approach to the innermost Eortions of the ear, the vestibule, from its structure, evidently as some other function. What this is, it is difficult to say. Its resemblance to the otolithic sac of lower animals favors the supposition that it serves for the mere detection of noise. The cochlea, represented at d, Fig. 186, is so-called from its resemblance to the spirally coiled shell of a snail or other gasteropod mollusk. It ma-be described as a conical tube, the axis very long compared with its diameter. This tube is wound spirally around a central axis. The spiral canal thus formed is divided throughout by a septum, called the lamina spiralis. This bears the so-called organ of Corti; in its structure it may be likened to a piano, which involves no less than some 3-00 nerve fibres or strings. In (419) we have learned that the resouatore of...
Read Less
Add this copy of A Textbook of Medical Physics for the Use of Students to cart. $59.20, good condition, Sold by Bonita rated 4.0 out of 5 stars, ships from Newport Coast, CA, UNITED STATES, published 2018 by Palala Press.
