MUSCLES OF PHARYNX AND PALATE 



1135 



(mm. pharyngopalatini), the three pharyngeal constrictors, and also the levator 

 and the tensor veH palatini, the m. uvulae and the stylo-pharyngeus. The stylo- 

 pharyngeus and pharyngo-palatine muscles form an incomplete longitudinal layer 

 within the more circularly arranged constrictors of the pharynx. 



Fig. 893. — View of Muscles of Soft Palate, as Seen from Behind, Within the Pharynx. 



(Modified from Bourgery.) 



Pharyngeal _ \ 

 aponeurosis — ** 



M. uvulae 

 Hamular process 



Pharyngo- 

 palatinus 



Auditory or 

 Eustachian tube 



Levator veli 

 palatini 



Phary ngo -palatinus 



Constrictor pharyngis 

 superior 



Root of tongue 



Crico-arytaenoideus 

 posterior 



Thyreoid cartilage 

 Cricoid cartilage 



Trachea 



(Esophagus 



The muscles are arranged in layers either behind or in front of the apo neurosis, 

 and in a horizontal section of the soft palate the following layers are met with from 

 behind forward: (1) The mucous membrane on the pharyngeal surface; (2) the 

 posterior layer of the pharj^ngo-palatinus (palato-pharyngeus) ; (3) the m. uvulae; 

 (4) the levator veli palatini; (5) the anterior layer of the pharyngo-palatinus; (6) 

 the palatal aponeurosis with the tensor veli palatini; (7) the glosso-palatinus 

 palato-glossus) ; and (8) the mucous membrane on the oral aspect. 



The glosso-palatinus (palato-glossus) is a cylindrical muscle extending between the soft 

 palate and the lateral border of the tongue. Origin. — From the oral surface of the palatal apo- 

 neurosis. Insertion. — (1) The superficial layer of muscles which covers the side and adjacent 

 part of the under surface of the tongue; (2) the transversus linguis. Structure. — At its origin 

 the muscle forms a thin sheet, but the fibres, passing lateralward, quickly concentrate to form 

 a cylindrical bundle, which passes downward beneath the mucous membrane of the pharynx 



