. Twentieth century practice; an international encyclopedia of modern medical science by leading authorities of Europe and America . d by a mucous membrane so thin as to be practically transpar-ent. They also extend from the receding angle of the thyroid to thearytenoid cartilages and project notably within the border of theventricular bands. The entrance to the ventricles of the larynx liesbetween the ventricular bands and the true cords, though only recog-nized as a shaded line at this point. When the cords are separatedin the act of respiration a small, knob-like projection is seen immedi-a
. Twentieth century practice; an international encyclopedia of modern medical science by leading authorities of Europe and America . d by a mucous membrane so thin as to be practically transpar-ent. They also extend from the receding angle of the thyroid to thearytenoid cartilages and project notably within the border of theventricular bands. The entrance to the ventricles of the larynx liesbetween the ventricular bands and the true cords, though only recog-nized as a shaded line at this point. When the cords are separatedin the act of respiration a small, knob-like projection is seen immedi-ately in front of each arytenoid cartilage. This is the vocal process,and is formed by a cartilaginous prolongation of the anterior angle ofthe base of the arytenoid cartilage. When the cords are broughttogether, the space or opening between them forms the rima glotti-dis, or chink of the glottis. During the act of phonation when thecords are in apposition this chink is merely a straight line extend-ing from the receding angle of the thyroid cartilage to the arytenoidcommissure. During the act of phonation the cords are brought. Fig. 48. -The Laryngeal Image during Phona-tion. Fig. 49.—The Laryngeal Image during Inspira-tion. into close approximation, as seen in Fig. 48, and thus a view of theparts below is prevented. During the act of inspiration, however,the cords are widely separated posteriorly and the subglottic por-tion of the larynx and the rings of the trachea may be brought underinspection (see Fig. 49), and in a favorable case even the a general way the appearance of a normal larynx differs in noespecial manner from the healthy mucous membrane seen in otherportions of the body. It is of a light rose-pinkish color with a ten-dency to a yellowish tinge especially where the cartilages are seenthrough the transparent membrane, as at the crest and sides of theepiglottis and at the prominence made by the cartilages of Wrisberg ACUTE LARYNGITIS, 329 and Santo
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Keywords: ., bookcentury1800, bookdecade189, booksubjectmedicine, bookyear1895
