176 MYOLOGY. 



ATTOLLENS POSTICUS. 



( Teni2)oro-auricularis Inter nus. ) 



(Fie. 72. c.) 



This is a triangular muscle of a bright-red colour, situated 

 under the attollens maximus. 



Origin. From the parietal crest, and by cellular tissue from 

 the temporalis. 



Insertion. The tendon is directed obliquely round the inter- 

 nal face of the concha, terminating in the conchal cartilage, below 

 the insertion of the retrahens externus. 



Relation. Externally with the maximus ; internally with the 

 temporalis. 



Action. It elevates and adducts the ear. 



RETRAHENS EXTERNUS. 



(Cervico-auricularis Externus. ) 



(Fie. 72. d.) 



Situated on the poll, at the side of the ear, it is thin and flat, 

 joining the attollens maximus. 



Origin. From the cordiform portion of the ligamentum 

 nuchae. 



Insertion. To the middle of the posterior surface of the 

 conchal cartilage. 



Relation. Externally with the skin ; internally with the 

 retrahens internus and medius. 



Action. It draws the ear backwards and downwards. 



RETRAHENS MEDIUS. 

 (Cervico-auricularis Medius.) 



(FiG. 72. e.) 



Broad and thin ; situated below the preceding. 



Origin. The same as the externus. 



Insertion. To the external part of the base of the concha 

 under the abducens, its tendon passing over the superior portion 

 of the parotid gland. 



Relation. Externally with the preceding muscle ; internally 

 with the internus and the parotid gland. 



Action. It rotates the ear, turning the opening backwards. 



