DISSECTING MANUAL. 



sum and sides, between the two preceding. Vertical fibres : 

 These run from the dorsum to the sides. [415] 



Muscles of Pharynx. 



Superior Constrictor. Origin; lower half of posterior bor- 

 der of internal pterygoid plate ; pterygo-mandibular ligament ; 

 mylo-hyoid ridge of lower jaw ; mucosa of floor of mouth. In- 

 sertion; pharyngeal spine of occipital; a median raphe in the 

 posterior pharyngeal wall. [416] 



Middle Constrictor. Origin; stylo-hyoid ligament; both 

 cornua of hyoid bone. Insertion; median raphe. [417] 



Inferior Constrictor. Origin; oblique line of thyroid car- 

 tilage ; side of cricoid cartilage. Insertion ; the median raphe, 

 the lower fibres blending with the oesophagus. [417] 



Stylo-pharyngeus. Origin; root of styloid process inter- 

 nally. Course; between the Superior and Middle constrictors. 

 Insertion; superior and posterior borders of thyroid cartilage; 

 pharyngeal wall, becoming continuous with the Palato- 

 phary ngeus . [417] 



Palato-pharyngeus. Origin; (postero-superior layer) op- 

 posite Palato-pharyngeus, the fibres being continuous; (an- 

 tero-inferior layer) posterior border of hard palate. Inser- 

 tion; posterior border of thyroid cartilage; pharyngeal apo- 

 neurosis as far as lower border of Inferior constrictor. [417] 



Muscles of Soft Palate. 



Azygos Uvulae. This consists of two narrow slips arising 

 from the posterior nasal spine and aponeurosis of the soft 

 palate ; they run backward between the layers of the Palato- 

 pharyngeus, unite, and end in the uvula. [418] 



Levator Palati. Origin; under surface of apex of petrous 

 bone; lower part of cartilaginous Eustachian tube. Course; 

 between the layers of the Palato-pharyngeus. Insertion; apo- 

 neurosis of soft palate. [418] 



Tensor Palati. Origin; scaphoid fossa and alar spine of 



[64] 



