THE MUSCLES OF THE HEAD. 



97 



face with the galea aponeurotica (to which the muscle is closely- 

 united), the epicranius muscle (//) and the temporal muscle (;/). 

 Action. — Draws the two ears dorsad, toward the middle 

 line. 



Fig. 63. — Muscles on the Dorsal Surface of the Head. 



On the right side are shown the superficial muscles; on the left side the super- 

 ficial muscles have mostly been removed, exposing the deeper muscles and the bone. 

 (7, M. intermedins scutulorum; /', M. corrugator sujiercilii niedialis; c, M. orbicularis 

 oculi; d, M. corrugator supercilii lateralis; e, cranial end fibres of M. platysma; f, 

 M. adductor auris superior; g, g', M. levator auris longus (g. cranial portion; ,(f, 

 caudal portion); //, h' , M. ejMcranius (//, M. occipitalis; h' M. frontalis); ?', M. trans- 

 versus auriculse; k, M. auricularis superior (cut on the left side); /, M. abductor 

 auris brevis; w, M. abductor auris longus; n, M. temporalis; f, cut origin of M. 

 frontoscutularis; p, p' ■, M. levator labii superioris alteque nasi (/', the origin from 

 the maxillary bone); ^, angular liead of M. quadratus labii superioris. i, scutiform 

 cartilage; 2, external ear; 3, bones of the skull. 



M. corrugator supercilii medialis {li). — This consists of 

 a thin sheet of scattered fibres lying craniad of the last and 

 intermingling with it. The fibres take origin near the middle 

 line, pass laterad, then curve craniad, converging, to be 



