CAVITY OF THE LARYNX 



1221 



glosso epiglottica medianaet lateralis]. From the sides of the pharynx it passes 

 medialward, first sinking between the thyreoid cartilage laterally and the aryt- 

 enoid and cricoid medially, entering into the walls of the piriform recess; then 

 passing over the superior margin of the quadrangular membrane to form the ary- 

 epiglottic fold. 



At the medial side of the piriform recess a shght fold of the mucosa [phca nervi laryngei) 

 corresponds to the superior laryngeal nerve. Between the root of the tongue and the epiglottis 

 is a depression subdivided in the middle hne and limited laterally by the median and lateral 



Fig. 986. — Cast of the Vestibtjlum and Cavtjm Oris, of the Pharynx, Larynx, of the 

 Upper Part of the Trachea and OEsophagus. Seen from in front And Ijelow. (Rauber- 

 Kopsch.) 



Rima oris 



Lower lip 



i ' Vestibulum oris 



Alveolar part of mandible 

 Tongue 



^ Glosso-epiglottic vallecula 

 1^ Vestibule of larynx 



, Piriform recess 

 Laryngeal ventricle 



Cavum laryngis inferius 

 Trachea 



CEsophagus 



glosso-epiglottic folds; this is the epiglottic vallecula [vallecula epiglottica]. The piriform 

 recess and the epiglottic vallecula are favorite sites for the lodgment of foreign bodies. The 

 ary-epiglottic fold [plica aryepiglottica] extends from the side of the epiglottis to the apex 

 of the arytsenoid cartilage; within it are fibres of the ary-epiglottic and thyreo-epiglottic 

 muscles and the cuneiform and corniculate cartilages. These cartilages correspond to two 

 rounded eminences on each side of the laryngeal entrance, the cuneiform and corniculate 

 tubercles [tuberculum cuneiforme (Wrisbergi); tuberculum corniculatum (Santorini)], respec- 

 tively. Of these, the former is often small and inconspicuous, the latter usually well developed 

 and prominent. 



The cavity of the larynx above the level of the ventricular folds is known as the 

 vestibule [vestibulum laryngis]. This is wide in its upper part, but the sides 

 incline toward the median line in descending, and the cavity becomes narrow 



