A treatise on the diseases and injuries of the larynx and trachea : founded on the essay to which was adjudged the Jacksonian prize for 1835 / by Frederick Ryland.

  • Ryland, Frederick (Surgeon)
Date:
1838
Catalogue details

Licence: Public Domain Mark

Credit: A treatise on the diseases and injuries of the larynx and trachea : founded on the essay to which was adjudged the Jacksonian prize for 1835 / by Frederick Ryland. Source: Wellcome Collection.

Provider: This material has been provided by the National Library of Medicine (U.S.), through the Medical Heritage Library. The original may be consulted at the National Library of Medicine (U.S.)

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    DISEASES THE LARYNX AND TRACHEA. CHAPTER I. ANATOMY OF THE LARYNX AND TRACHEA. The larynx is situated in the upper and front part of the neck, its inferior margin having a membranous connection with the upper ring of the trachea, with the cavity of which organ it freely com- municates. Its superior edge is placed immediately below the pharynx and the root of the tongue, and is attached to the os hy- oides by the hyo-thyroid membrane in front and at the sides, and posteriorly by two round ligaments, nearly an inch in length, which unite the extremities of the cornua of the os hyoides to the great cornua of the thyroid cartilage. The thyro-hyoides muscle forms another link of connection between the os hyoides and the thyroid cartilage. The anterior surface of the larynx is covered only by the skin and by the sterno-hyoidei and sterno-thyroidei muscles; the poste- rior surface is in immediate contact with the pharynx and the back of the mouth. The larynx is composed of a strong frame-work of cartilages, which afford protection to the more delicate internal parts, and give points of support for the muscles necessary to the production of the vocal phenomena; muscles to move these cartilages in various directions; articulations with their accompanying ligaments; vessels, nerves, glands, and a mucous membrane, which lines the interior of the larynx throughout. THE CARTILAGES. Of the cartilages that enter into the structure of the vocal organs, the thyroid is the largest; placed at the front and sides of the larynx, it is formed of two broad aloe, which meet anteriorly at an