MUSCLES OF THE PHARYNGEAL REGION 



315 



In passing forward to its insertion it crosses over the hyoideus trans- 



versus. 



Action. To retract the tongue. 



10 13 



Fit;. 375. Muscles of the Tongue, Soft Palate, and Larynx 



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

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

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

 14, Great Hyo-Glossus. 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 PHAEYNGEAL REGION 



PterygO-PharyngeilS. 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 bone. 



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

 those of its fellow. 



Thyro-Pharyngeus. Situated behind 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. 



