. A system of anatomy for the use of students of medicine (Volume 1). ent in the neck; it is called the Po-mum Adami. Both the upper and lower edges of the thyroid cartilage ter-minate posteriorly in processes, which are called Cornua. Thetwo uppermost are longest: they are joined by ligaments to theextremities of the os hyoides. The lower and shorter processesare fixed to the cricoid cartilage. The thyroid cartilage, there-fore partly rests upon the cricoid cartilage below, and is attachedto the os hyoides above. It is influenced by the muscles whichact upon the os hyoides, and also by some m
. A system of anatomy for the use of students of medicine (Volume 1). ent in the neck; it is called the Po-mum Adami. Both the upper and lower edges of the thyroid cartilage ter-minate posteriorly in processes, which are called Cornua. Thetwo uppermost are longest: they are joined by ligaments to theextremities of the os hyoides. The lower and shorter processesare fixed to the cricoid cartilage. The thyroid cartilage, there-fore partly rests upon the cricoid cartilage below, and is attachedto the os hyoides above. It is influenced by the muscles whichact upon the os hyoides, and also by some muscles which areinserted into itself. It is moved obliquely downwards and for-wards in a slight degree upon the cricoid cartilage, by a smallmuscle, the crico-thyroideus, which arises from that cartilage andis inserted into it. —The external lateral surface of the thyroid cartilage isslightly concave, and across it, passes a small ridge obliquelyfrom above downwards, and from behind forwards, which givesattachment above to the thvro-hvoid and below to the sterno-. 440 ARYTENOID CARTILAGES. hyoid muscles. The posterior or inside face of the PomumAdami presents an entering angle, where the two symmetricalsides of the cartilage meet, and in which is attached the thyro-arytenoid muscles, the pedicle of the epiglottis and one end ofthe vocal ligaments. The upper margin of the cartilage pre-sents a curved appearance like that of the italic long f\ a simi-lar curvature is also observable on its posterior margin.— The Arytenoid cartilages are two small bo-dies of a triangular or pyramidal form andslightly curved backward. They are placed cupon the upper and posterior edge of the cri-coid cartilage, near to each other; and theirupper ends, taken together, resemble the mouthof a pitcher or ewer; from which circumstance •----their name is derived. Their bases are broad;and on their lower surfaces is a cavity, whichcorresponds with the convex edge of the cri-coid cartilage, to which
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