PHARYNX 371 



internal jugular vein. This venous plexus, together with the 

 pharyngeal plexus of nerves, will require to be removed in 

 order to display the muscles properly. 



Constrictor Muscles. The constrictor muscles are three 

 curved sheets of muscular fibres which are so arranged that 

 they overlap each other from below upwards; thus, the 



Buccinator. 

 Tensor veil palatini. 

 Levator veli palatini. 

 Superior constrictor. 

 Middle constrictor. 

 Inferior constrictor. 

 Thyreo-hyoid. 

 Hyoglossus. 

 Stylo-hyoid. 

 Mylo-hyoid. 

 Crico-thyreoid. 

 Stylc-pharyngeus. 

 Stylo-glossus. 

 Stylo-hyoid ligament. 

 Pterygo-mandibular raphe. 

 Glosso-pharyngeal nerve. 

 Superior laryngeal artery. 

 Superior laryngeal nerve. 

 External laryngeal nerve. 

 Inferior laryngeal nerve and 

 artery. 



FIG. 148. Profile view of the Pharynx to show the Constrictor 

 Muscles. (From Turner.) 



inferior constrictor overlaps the lower part of the middle 

 constrictor, whilst the middle constrictor, in turn, overlaps the 

 lower part of the superior constrictor. The three muscles are 

 inserted, in the median plane, into the median raphe which 

 descends from the basilar portion of the occipital bone along 

 the posterior aspect of the pharynx. 



Musculus Constrictor Pharyngis Inferior (Fig. 148, /). 



