44 



Larynx. 



375. The Laryngoscopic 



View in the Production 

 of Voice. 



Natural size. 



370. The Laryngoscopic 

 View of the Posterior 

 Laryngeal andTracheal 



Wall and the Place of Bifur- 

 cation. Natural size. 



The vocal cords are situated one above the other, in the interior 

 of the larynx, between the inner surfaces of the lamellae of the thyroid 

 cartilage and the arytenoid cartilages. The superior or false vocal cords, 

 or Liyamcnta ijlotttdis spuria, are two folds of mucous membrane, enclosing 

 a delicate fibrous band of elastic tissue, the superior thyro-ary tenoid 

 ligament, attached to the anterior margin of the arytenoid cartilage 

 and angle of the thyroid. The inferior or true vocal cords, or 

 Ligamenta glottidis vcra, are two fibrous bands of elastic tissue, the inferior 

 thyro-ary tenoid ligaments, covered by mucous membrane, and 

 attached to the vocal process of the arytenoid cartilage and depression 

 between the alae of the thyroid. The slit between the false vocal cords 

 is called Glottis spur /.a, that between the true vocal cords Glottis vcra; 

 between the; true and false vocal cords on each side is a depression, the 

 ftimis x. Vcntriculus Morgayni. 



The Jiiiixt, glottidis between the true vocal cords has in quiet 

 breathing a triangular shape, through which the anterior wall of the 

 larynx (region of the thyroid cartilage, Li<j. c.onicum, cricoid cartilage) and 

 the trachea (tracheal cartilages) can be seen by means of the laryngo- 

 scope; by a corresponding position of the mirror, the posterior wall of 

 the larynx (region between both arytenoid cartilages) and the trachea (Pars 

 membranacea) down to the place of bifurcation of the latter, can also 

 be seen. At the moment of phonation the Iliina glottidis is completely 

 closed. 



