THE EAR. 



419 



{b) The following three muscles connect tlie scutiform 

 cartilage with other parts of the external ear. 



M. rotator auris or scutuloauricularis inferior. — A flat 

 craniocauclal band of fibres lying between the auricle and the 

 temporal muscle. 



Origin on the scutiform cartilage, 

 just caudad of the insertion of the 

 frontoscutularis, of which this muscle 

 seems to be a continuation. The 

 muscle passes caudad as a band seven 

 or eight millimeters wide, curving 

 about the medial surface of the auri- 

 cle, and is inserted on the caudo- 

 medial surface of the eminentia 

 concha;. 



Relations. — Lateral surface with 

 the awricular cartilage; medial surface 

 with the temporal muscle. 



Action. — Rotates the external ear 

 mediad and caudad. 



M. adductor auris superior (Fig. 

 169, 1; Fig. 6t„ /). (Part of the 

 auricularis anterior of man.) 



Origin on the dorsal surface of 

 the scutiform cartilage for its entire 



length. The fibres form a continua- Fig. 169.— Cartilage of the 



. • r 4-1 r 4-1 r 4- 4- 1 • External Ear, with Mus- 



tion of those 01 the frontoscutularis; ^^^^ ' 



they pass dorsocaudad and are in- a-i, as in Fig. 168. i, M. 

 serted'mio the spina helicis or cranio- ^^"^"^^7 f""' superior (cut); 2, 



^ _ . '^^- adductor auris medius (cut); 



medial margin of the auricular carti- 3, M. helicis; 4, M. tragicuslater- 



lap-p Thic; iniisrle lie^ in tlie fold ^'is(c"0; 5. 5', M- tragicus me- 

 lage.^ inis muscie lies in tne loia ^^-^^y^^. ^ jyj antitragicus; 7, M. 



of skin that connects the Craniomedial adductor auris inferior (cut); 8, 

 , r ^y .1 ,.| .,1 M. depressor conchne (cut); Q, M. 



angle of the auricular cartilage with conch^us extemus; 10, part of 

 the head, so that it is covered on both ^^- auricularis extemus; n, M. 



. , . abductor auris longus (cut). 



sides by integument. 



Action. — Draws the auricle craniad. 



M. adductor auris medius (Fig. 169, 2). (Part of the 



