ANATOMY OF THE LARYNX 



481 



around the larynx, but only covers the front portion, b, The cricoid cartilage, figure 342, 

 5, 6, on the other hand, is a complete ring; the back part of the ring being much broader 

 than the front. On the top of this broad portion of the cricoid are, c, the arytenoid car- 

 tilages, figure 342, 7, the connection between the cricoid below and arytenoid cartilages 



FIG. 342. Cartilages of the Larynx Seen from the Front, i to 4, Thyroid cartilage; T, verti- 

 cal ridge or pomum Adami; 2, right al&; 3, superior, and 4, inferior cornu of the right side; 5, 6, 

 cricoid cartilage; 5, inside of the posterior part; 6, anterior narrow part of the ring; 7, arytenoid 

 cartilages. Xf. 



above being a joint with synovial membrane and ligaments, the latter permitting tolerably 

 free motion between them. 



Joints and Ligaments. The thyroid cartilage is also connected with the cricoid, not 

 only by ligaments, but also by joints with synovial membranes; the lower cornua of the 

 thyroid clasping the cricoid between them, yet not so tightly but that the thyroid can re- 



Caife "Wriabergii 

 Cart, Santorint 



Cart, aryten. 

 ICroc. itrasciil. _ 

 Eigs crico-aryten. 



Corntcin&E. 



Cartviracnero 



membra*. 



FIG, 3 43 . The Larynx as Seen From Behind after Removal of the Muscles. The cartilages and 

 ligaments only remain. (Stoerk.) 



volve, within a certain range, around an axis passing transversely through the two joints. 

 The vocal cords are attached behind to the front portion of the base of the arytenoid car- 

 tilages, and in front to the re-entering angle at the back part of "the thyroid; it is evident, 

 therefore, that all movements of either of these cartilages must produce an effect on them 

 of some kind or other. Inasmuch, too, as the arytenoid cartilages rest on the top of the 

 back portion of the cricoid cartilage, and are connected with it by capsular and other liga- 

 ments, all movements of the cricoid cartilage must move the arytenoid cartilages, and also 

 produce an effect on the vocal cords. 

 31 



