MUSCLES OF THE PHARYNGEAL REGION 



315 



In passing forward to its insertion it crosses o^•er tlie Inoideus trans- 

 versus. 



Action. — To retract tlie tonoue. 



Fig. 375. — Muscles of tlie Tongue, Soft Palate, and Larynx 



1, Tensor Palati. 2, Occiijito-Styloid (right). 3, Occipito-Styloid (left). 4, Pahito-Glossus. 5, Stylo- 

 Hyoid Pharyngeus. 6, Thyro-Pharyngeus. 7, Crico-Pharyngeiis. 8, Palato-Pharyngeus. 9, Crico- 

 Thyroideus. 10, Sterno-Tliyroideus. 11, Thyro-Hyoideus. 12, Stylo-Glossus. 13, Genio-Hyoideus. 

 14, Great Hyo-GIossus. 15, Genio-Hyo-Glossus. 16, (Esophagus. 



PalatO-Glossus. — A small collection of muscle fibres arising from the 

 side of the pharynx and becoming inserted into the root of the tongue. 

 Action. — To constrict the fauces. 



MUSCLES OF THE PHARYNGEAL EEGION 



PterygO-Pharyngeus. — A thin, flat, triangular muscle lying above 

 the pharynx. 



Origin. — From the pterygoid process, from which its fibres spread out 

 fan-like and become inserted into the upper and lateral aspect of the 

 pharynx. Some of its fibres intermix with those of the palato-pharyngeus. 



Action. — To constrict the pharynx. 



Hyo-PharyngeuS. — A small muscle situated on the inferior and 

 lateral parts of the pharynx in front. 



Origin. — From the heel process of the hyoid l»one. 



Insertion. — Into the roof of the pharynx, where its fibres interlace with 

 those of its fellow. 



Thyro-Pharyngeus. — Situated l)ehind the one last described. 



Origin. — From the outer surface of the thyroid cartilage. 



Insertion. — Into the roof of the pharynx, where its fibres interlace with 

 those of its fellow. 



