62 A NATO My AND PHYSIOLOGY FOR NURSES 



lower jaw. Nerve-supply from the facial and inferior 

 dental. 



Stylohyoid. Arises from the styloid process of the 

 temporal bone. Insertion, into the body of the hyoid bone 

 Action, same as the former. 



Geniohyoid. Arises from the inferior tubercle of the 

 lower jaw and is inserted in the hyoid bone. Action, same 

 as the digastric. 



Geniohyoglossus. Originates from the superior 

 tubercle of the lower jaw. Inserted into the body of the 

 hyoid bone, side of the pharynx, and tongue from the base 

 to the tip. Action, protrudes as well as retracts the tongue ; 

 it also produces a longitudinal groove in this organ, as in 

 the act of sucking. Nerve-supply, the hypoglossal. 



Hyoglossus. Arises from the hyoid bone; inserted 

 in the sides of the tongue. Action, makes this organ con- 

 vex from side to side. Nerve-supply from the hypoglossal. 



Styloglossus. Arises from the styloid process of 

 the temporal bone. Insertion, into the side of the tongue. 

 Action, draws the tongue upward and backward. Nerve, 

 hypoglossal. 



Lingualis. Forms the bulk of the tongue, and is 

 blended with the other muscles which are attached to this 

 organ. Its action is in unison with that of the other 

 muscles. 



Palate Region. This region is supplied with the 

 following muscles: Levator palati, tensor palati, azygos 

 uvulae, palatoglossus, palatopharyngeus. They arise 

 from adjacent bony structures and have control over the 

 soft palate and uvula, besides assisting in the acts of 

 speech, deglutition, and mastication. 



Pharyngeal Region. The muscles found in the 

 pharyngeal region are the following: Three constrictors 

 the inferior, the superior, and the medius ; the stylopharyn- 

 geus and the palatopharyngeus. 



