312 



LABORATORY MANUAL OF HUMAN ANATOMY 



M. thyreoarytaenoideus [externus], the two being scarcely sep- 

 arable. ) 

 (e) Ventricular muscle (M. ventricularis) . 



This is a minute muscle in the plica ventricularis, scarcely to be 

 made out except with the aid of the microscope. 



Eemove cautiously the M. cricoarytaenoideus lateralis and 

 try to separate the M. thyreoarytaenoideus [externus] from the 

 more medially situated M. vocalis. Ascertain the relation of the 

 latter to the labium vocale and then remove it. Study the parts 

 now exposed. 



FIG. 136. 



Bundle of the M. stylopharyngeus 



XSB&X 



M. aryepiglotticus 



Glandulae laryngeae mediae 

 _ Tunica mucosa laryngis 



^ Mm. arytaenoidei obliqui 

 _ M. arytaenoideus transversus 



M. cricothyreoideus 

 Articulatio cricothyreoidea 



M. crico-arytaenoideus posterior 



M. ceratocricoideus (Var.) 



Muscles of larynx seen from behind. Part of the right lamina of the thyreoid cartilage has been 

 removed. (After Toldt, Anat. Atlas, Wien, 1900, 2 Aufl., p. 444, Fig. 751.) 



Elastic Membrane of Larynx (Membrana elastica laryngis). 



(a) Elastic cone (conus elasticus} (0. T. cricothyroid membrane). 



(aa) Vocal ligament (ligamentum vocale} (0. T. inferior thyro- 

 arytenoid ligament). 



Observe that this is really the upper free 

 thickened border of the conus elasticus. Note 

 especially its anterior and posterior attachments. 

 Between the two ligamenta vocalia in front 

 observe 

 ( aaa ) Sesamoid cartilage (cartilago sesamoidea}. 



(b) Quadrangular membrane (membrana quadrangularis) . 



(ba) Ventricular ligament (ligamentum ventriculare) (0. T. 

 superior thyro-arytenoid ligament). 



