MUSCLES OF THE NECK. 185 



The ATTRAHENS AUREM (anterior auris), also tiiangular, arises from 

 the edge of the aponeurosis of the occipito-frontalis, and is inserted into 

 the anterior part of the helix, covering in the anterior and posterior tem- 

 poral arteries. 



It is in relation by its external surface with the integument ; and by the 

 internal with the temporal aponeurosis and with the temporal artery and 

 veins. 



The RETRAHENS AUREM (posterior auris), arises by three or four mus- 

 cular slips from the mastoid process. They are inserted into the posterior 

 surface of the concha. 



It is in relation by its external surface with the integument, and by its 

 internal surface w T ith the mastoid portion of the temporal bone. 



Actions. The muscles of the auricular region possess but little action 

 in man ; they are the analogues of important muscles in brutes. Their 

 use is sufficiently explained in their names. 



MUSCLES OF THE NECK. 



The muscles of the neck may be arranged into eight groups correspond 

 ing with the natural divisions of the region ; they are the 



1. Superficial group. 



2. Depressors of the os hyoides and larynx. 



3. Elevators of the os hyoides and larynx. 



4. Lingual group. 



5. Pharyngeal group. 



6. Soft palate group. 



7. Prsevertebral group. 



8. Proper muscles of the larynx. 



And each of these groups consist of the following muscles : viz. 



1. Superficial Group. Stylo-glossus, 

 Platysma-myoides, Palato-glossus. 

 Sterno-cleido-mastoideus. 



5. Muscles of the Pharynx. 



2. Depressors of the os hyoides Constrictor inferior, 



and larynx. Constrictor medius, 



Sterno-hyoideus, Constrictor superior, 



Sterno-thyroideus, Stylo-pharyngeus, 



Thyro-hypideus, Palato-pharyngeus. 

 Omo-hyoideus. 



6. Muscles of the soft Palate. 



3. Elevators of the os hyoides Levator palati, 



and larynx. Tensor palati, 



Digastricus, Azygos uvula?, 



Stylo-hyoideus, Palato-glossus, 



Mylp-hyoideus, Palato-pharyngeus. 

 Genio-hyoideus, 



Gemo-hyo-glossus. 7. Prcevertebral Group. 



Rectus anticus major, 



4. Muscles of the Tongue. Rectus anticus minor, 

 Genio-hyo-glossus, Scalenus anticus, 

 Hyo-glossus, Scalenus posticus, 

 Lmguahs, Longus colli. 



16* 



