A text-book on diseases of the ear, nose and throat . From their anterior part there is an upward prolonga-tion known as the sacculus laryngis, or pouch of the larynx. It runsup for about half an inch between the false cord and the thyroid car-tilage, being covered on its outer surface by the fibres of the thyro-ary-tenoid muscle. Each pouch is abundantly supplied with glands andnerve-twigs from the superior laryngeal. The arrangement of the mus- 584 DISEASES OF THE LARYNX. cular fibres about the poucli is such that their contraction easily serves toempty it. The laryngeal mucosa is, as a rule
A text-book on diseases of the ear, nose and throat . From their anterior part there is an upward prolonga-tion known as the sacculus laryngis, or pouch of the larynx. It runsup for about half an inch between the false cord and the thyroid car-tilage, being covered on its outer surface by the fibres of the thyro-ary-tenoid muscle. Each pouch is abundantly supplied with glands andnerve-twigs from the superior laryngeal. The arrangement of the mus- 584 DISEASES OF THE LARYNX. cular fibres about the poucli is such that their contraction easily serves toempty it. The laryngeal mucosa is, as a rule, thin and closely attached to theneighboring parts. About the aryteno-epiglottidean folds it has muchsubjacent loose areolar tissue, conducive to copious inflammatory exuda-tion. As a rule, the mucosa is ciliated, though on the true cords them-selves it is of the stratified variety. The same condition obtains froma level slightly above the false cords at the sides and the middle ofthe epiglottis in front. The arteries (Figs. 230 and 231) Fig. come from the superior thyroidbranch of the external carotidand the inferior thyroid fromthe subclavian. The veins jointhe superior, middle, and inferiorthyroid groups. There are upperand lower lymphatics, the formerpiercing the thyrohyoid mem-brane and the latter the crico-thyroid. The former lead toglands near the carotid bifurca-tion. The nerve-supply (Fig. 232)is from the pneumogastric, bymeans of the superior laryngeal,to the entire mucosa, the crico-thyroid muscle, and, in part, the arytenoid muscle. bearing thus infill Arterial supply of the larynx, posterior view,showing the distribution of the superior laryngealartery. (Bosworth.) in its trunk both motor and sen-sory fibres. The inferior laryn-geal nerve supplies all the mus-cles except those named above,and in part the arytenoid. Muscles of the Larynx.—Themuscular supply of the larynxmay be studied from variousstand-points. As some of the muscles have more than a single
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Keywords: ., bookcentury1900, bookdecade1900, bookidtextbookondi, bookyear1901
