Muscles of the Neck. 155 



M. mylo-hyoid. 



209. The Muscles of the Tongue. 



Muscles of the Hyoid Bone (Elevators of the Hyoid Bone) : 



M. stylo-hyoideus. Orig. : Base of the styloid process. Insert. : Into the 

 upper border of the hyoid bone. 



M. mylo-liyoideus (Fig. 208). Orig. : Lima mylo-liyoidea of the lower 

 jaw. Insert, of the external fibres: Into the anterior surface of the body 

 of the hyoid bone ; of the internal : Into a median tendinous raphe. 



M. genio-liyoideus arises from the Spina mentalis internet (genial tubercle), 

 and is inserted into the body of the hyoid bone. 



Muscles of the Tongue: 



M. genio-glossus sen genio-liyo-glossus. It arises from the Spina mentalis 

 interna and is attached to the tongue and hyoid bone. (Depresses and 

 protrudes the tongue.) 



M. hyo-glossus. Orig. : From the upper border of the body, and of the 

 greater and lesser cornua of the hyoid bone. Insert.: Into the posterior 

 lateral border of the tongue. (Depresses the tongue.) 



M. stylo-glossus. Orig. : Styloid process and stylo-maxillary ligament. 

 Insert.: Into the side of the tongue. (Acting singly it draws the tongue 



laterally, acting on both sides it draws it backwards.) 



20* 



