Experimental Researches On the Tension of the Vocal Bands. (A) the Action of the Thyro-Cricoid Muscle. (B) the Action of the Expiratory Blast of Air
The book Experimental Researches On the Tension of the Vocal Bands. (A) the Action of the Thyro-Cricoid Muscle. (B) the Action of the Expiratory Blast of Air was written by author Hooper, Franklin Henry, 1850-1892 Here you can read free online of Experimental Researches On the Tension of the Vocal Bands. (A) the Action of the Thyro-Cricoid Muscle. (B) the Action of the Expiratory Blast of Air book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Experimental Researches On the Tension of the Vocal Bands. (A) the Action of the Thyro-Cricoid Muscle. (B) the Action of the Expiratory Blast of Air a good or bad book?
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The vertical line bearing the num- bers 20, 40, 50 represents the pressures in millimetres of mercury, the Fick's manometer having been experimentally graduated. The dotted lines show the positions of the ascending levers attached to the cartilages at corresponding pressures. The arrow indicates the direction in which the curves are to be read. The tracings in this figure (i) were obtained by inflation of the trachea when the extrinsic muscles of the larynx were intact. A glance at the diagram ...shows that at equal pressures the rise of the cricoid curve above its zero line exceeds that of the thyroid. By measurement we have at a pressure of 20 mm. Hg., an ascent of the cricoid lever of 8 millimetres, while that of the thyroid at the same pressure is 7. As the force of the blast of air is in- creased, the difference is more marked. At a pressure of 40 mm. Hg., the cricoid moves up 16 mm., the thyroid 10.5 mm. At a pressure of 50 mm. Hg., the lO F. H. HOOPER. increase is still greater. Under this pressure the cricoid goes up 19.5 mm.
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