2009, ISBN: 1443273651, Lieferbar binnen 4-6 Wochen

Internationaler Buchtitel. In englischer Sprache. Verlag: Cambridge Scholars Publishing, 736 Seiten, L=152mm, B=229mm, H=41mm, Gew.=1061gr, [GR: I-XL - Computers - Languages / Programming… Plus…

Internationaler Buchtitel. In englischer Sprache. Verlag: Cambridge Scholars Publishing, 736 Seiten, L=152mm, B=229mm, H=41mm, Gew.=1061gr, [GR: I-XL - Computers - Languages / Programming], Kartoniert/Broschiert, Klappentext: Purchase of this book includes free trial access to www.million-books.com where you can read more than a million books for free. Excerpt from book: Section 3DISEASES OF THE NASAL PASSAGES. CHAPTER I. METHODS OF EXAMINING THE UPPER AIR PASSAGES. The essential physiological process by which the human voice is produced in the larynx, its pitch regulated, and its volume and other qualities governed, was a source of speculation even in the earliest days of medicine, and the ingenuity of many able investigators, such as Bozzini, Babington, Bennati, Avery, and others, was exercised to devise special appliances by which the movements of the vocal cords might be seen. None of these devices proved successful, however, until, among others, Manuel Garcia, a distinguished teacher of vocal music in London, interested himself in the subject. He obtained a view of his own larynx and the results of his investigations of the function of the vocal cords in phonation he presented before the Bxiyal Society of London in a paper entitled "Physiological Observations on the Human Voice." Garcia's method was exceedingly simple. An ordinary dental mirror, inclined at a proper angle, was placed well back in the fauces in such a manner that it should receive the direct rays of sunlight, while, at the same time, the visual image was reflected back in the same direction and perceived by Garcia in a hand-mirror held before his eyes. Garcia's obervations were published merely as a contribution to vocal physiology. Tiirck, of Vienna, however, soon after, becoming acquainted with Garcia's experiment, conceived the idea that this method might be employed for the diagnosis of laryngeal disease. He failed to improve on Garcia's simple manipulation, and accomplished no encouraging results. Czermak, of Pesth, however, took up the matter where Tiirck left off, and, improving on his methods, succeeded in demonstrating conclusively that this device might be made to render the greatest possib...<

ISBN: 1443273651

ISBN: 1443273651