"94 



A MANUAL OF ANATOMY 



The musculus helicis major extends from the spine of the hehx 

 along the anterior part of the hehx as high as the level at which 

 it curves backwards. 



The musculus helicis minor lies upon the crus hehcis. 



The musculus tragicus lies upon the outer surface of the tragus, 

 its fibres being almost vertical. 



The musculus antitragicus extends from the outer surface of the 

 antitragus backwards and slightly upwards, to be attached to the 

 processus caudatus of the hehx. 



Attrahens Auriculam 

 Musculus Helicis Major.. ^ 



Musculus Helicis Minor 



Musculus Tragicus _ 



— Attollens Auriculam 



'^Retrahens Auriculam 



Fig. 



Processus Caudatus of Helix 

 Musculus Antitragicus 



485. — The Outer Surface of the Left Auricle and its 

 Muscles (Arnold). 



Muscles on Inner Surface. — These are as follows: (i) the musculus 

 transversus, and (2) the musculus obliquus. 



The musculus transversus extends over the depression which 

 corresponds to the antihelix on the outer surface, its attachments 

 being to the convexity of the concha on the one hand, and the 

 convexity of the fossa of the helix on the other. 



The musculus obliquus extends over the depression corresponding 

 to the lower crus of the antihelix on the outer surface. 



Action of the Intrinsic Muscles. — The musculus tragicus and 

 musculus antitragicus diminish the orifice of the meatus auditorius 

 externus, and the muscles of the helix, major and minor, have an 

 opposite effect. 



