THE AURICULAR MUSCLES 



751 



6. The deep auricular or rotator muscles (M. auriculares profundi s. rotatores 

 aurknilte), two in numl)er, are situated under the scutiform cartilage and the l)ase 

 of the concha and cross each other. 



(a) The scutulo-auricularis profundus major is the strongest of the auricular 

 muscles. It is flat and is about an inch wide. It arises from the deep face of the 

 scutiform cartilage and passes backward to end on and below the most prominent 

 part of the base of the conclia ((nuinentia conchse). 



{b) The scutulo-auricularis profundus minor lies l)etween the l^ase of the con- 

 cha and the preceding muscle, and is best seen when the latter is cut and reflected. 



Fig 564.— MrscLES of External Ear of Horse, Viewed from Above. 

 On the right side parts of the superficial muscles have been removed and the scutiform cartilage turned back 

 to display the deeper muscles, a, Frontal part, a', temporal part of fronto-scutular.s; b, m terscutulans; c. 

 cervicScutularis; d, e, scutulo-auricularis superficialis superior and medius; /, zygomatico-aunculans; ,,scutulo- 

 auri ularis superficia is accessorius; o. cervico-auricularis superficialis; ,, scutulo-auncular.s superficiahs inferior 

 nud?orn cartilage; u, parieto-auricularis; ., cervico-auricularis profundus ma,or; w, cervico-aunculans p of. 

 minor; .""'.scutulo-auricularis prof, major et minor; y, temporalis. (EUenberger-Baum. Anat. d. Haust.ere.) 



It is flat and about an inch in length. It arises from the posterior part of the deep 

 face of the scutiform cartilage and from the cervico-scutularis, and passes down- 

 ward, backward, and outward to be inserted into the base of the concha under 

 cover of the preceding muscle. . 



7 The tragicus or mastoido-auricularis is a small muscle which arises from 

 the temporal bone just behind the external auditory process and from the annu ar 

 cartilage; it passes upward to be inserted into the lower part of the anterior border 



of the conchal cartilage. ,.,.,. . -tt - or.^ o. 



The intrinsic muscles are very small and of little importance. The> are as 



° "^r The antitragicus consists of a few bundles which are attached to the conchal 



