THE EAR. 177 



forehead. Insertion. Into the hind and lov/er part of the 

 concha. Action. To adduct the ears. 



Anterior conch/e. Origin. From the top of the angu- 

 lar cartilage and the temporal fascia. Insertion. Into the 

 interior of tl^e concha. Action. To assist in rotating the 

 ear, and to hold its opening forward. 



REcru.s coNCH/E. Origin. From the top of the angular 

 cartilage. Insertion. Into the inner side of the concha. 

 Action. To adduct the ear, and incline its opening back- 

 ward. 



Internus conchte. a pair of decussating muscles. 

 Origin. From the bottom of the angular cartilage. Inser- 

 tion. Into the lower and hind part of the concha. Action. 

 To rotate the ear, and incline the fissure backward. 



Abductor concha. Origin. From the surface of the 

 parotid gland. Insertion. Below the fissure into the concha. 

 Action. To abduct the ear. 



Profundus conchte. Origin. Back of the meatus audi- 

 torius. Insertion. Near the root of the concha into its 

 inner border. Action. To slant the ear forward. 



Connectores conchve. Two small slips of fibre upon 

 the concha, passing from one border to another, near to 

 the termination of the fissure. Action. To diminish the 

 size of the opening to the ear. 



Circulatores conch.e. a circle of fibres also passes 

 round the surface of the concha, near to the middle. Action. 

 To keep the point of the cartilage erect, and with the con- 

 nectores to diminish its opening. 



Retrahens superior. Origin, From a white line at 

 the back of the pole. Insertion. Into the back of the 

 concha. Action. To draw the ear backward ; both acting- 

 would incline the ears outward. 



Retrahens medius. Origin. From the back of the pole. 

 Insertions of the outer head. Into the outer and lower part 

 of the concha. Of the inner layer. Into the lower border 

 and inner surface of the concha. This might be well 

 divided into two muscles. Action. To rotate the ear, and 

 also to incline it backward. 



The meatus auditorius is in part bony, and in part carti- 

 laginous ; the outward extremity being furnished with car- 

 tilage. The inside of the ear is said to be lined with 



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