A treatise on diseases of the nose and throat.

  • Shurly, Ernest Lorenzo.
Date:
1900
Catalogue details

Licence: Public Domain Mark

Credit: A treatise on diseases of the nose and throat. Source: Wellcome Collection.

Provider: This material has been provided by the Harvey Cushing/John Hay Whitney Medical Library at Yale University, through the Medical Heritage Library. The original may be consulted at the Harvey Cushing/John Hay Whitney Medical Library at Yale University.

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    angle of the thyroid cartilage just below the thyroid notch by the thyro-epiglottic ligament, and to the hyoid bone by the hyo-epiglottic ligament. At its base on each side are attached the ary-epiglottic folds. The cartilages of Santorini, also known as the cornicula laryngis, are located in the membrane over the summit of each arytenoid. The cartilages of Wris- berg are also placed in the aryteno-epiglottic folds. The thyro-hyoid ligament, or membrane, more properly speaking, connects the thyroid cartilage with the hyoid bone, extending from the upper border of the former to the upper posterior border of the latter. The lateral hyoid ligaments extend from the superior horns of the thyroid cartilage to the greater horns of the hyoid bone. The hyo-epiglottic ligament connects the epiglottis near its apex to the posterior surface of the body of the hyoid bone. The thyro-epiglottic ligament connects the base of the epiglottis with the thyroid cartilage. The glosso-epiglottic ligament, consisting of a median portion and two lateral folds, serves to attach the epiglottis to the base of the tongue. The crico-thyroid membrane or median liga- ment connects the thyroid with the cricoid cartilage ; it is thick and elastic, and forms the anterior covering of the larynx below the thyroid. The anterior insertion of the true vocal cords is blended on the sides of this membrane, which explains the frequent impairment of the voice following the operation of thyrotomy. In the median line it is subcutane- ous, but on the sides it is covered by the crico-thyroid mus- cles. Its surface is crossed from side to side by an anastomosis between the crico-thyroid arteries. Laterally its inner surface is in relation with the thyro-arytenoid and lateral cricoaryte- noid muscles. The lateral crico-thyroid ligaments keep in co- aptation the articular surfaces of the inferior horns of the thyroid with the sides of the cricoid cartilage. The crico- arytenoids are the capsular ligaments of the crico-arytenoid joints. Muscles of the Larynx.—The laryngeal muscles may be divided into those governing the vocal cords and into those controlling the movements of the epiglottis and laryngeal ves- tibule. The former may be subdivided into muscles which approximate and tighten the vocal cords and into those which relax and separate them. The crico-thyroid muscles, triangu- lar in shape, take their origin from the front and sides of the