176 MYOLOGY. 



ATTOLLENS POSTICUS. 



(Temporo-auricularis Internua.) 



(Fig. 72. c.) 



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

 under the attollens maxiraus. 



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. 



RETEAHENS EXTERNUS. 



(Cervico-auricularis Externus.) 



(Fig. 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 

 nuchse. 



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. 



InseHion. — 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 aud the parotid gland. 



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



