MUSCLES OF THE NECK. 185 



Insertion Neck of inferior maxillary, below the con- 



dyle. 

 Nerve Inferior maxillary. 



MUSCLES OF THE NECK. 

 PLATYSMA MYOIDES. 



Origin A superficial plane of muscular fibres passing 



obliquely up the neck from the clavicle between the 



layers of the superficial fascia. 

 Insertion Into the inferior maxillary and fascia of 



face. 

 Nerves Facial and superficial branch of cervical 



plexus. 

 STERNO-CLAVICULO-MASTOID. 



Origin Two heads, one a round tendon from the 



sternum. The clavicular origin is fleshy and about 



one and one-half inches broad. 

 Insertion It passes upward and backward, divides 



the side of the neck into two great triangles, and is 



inserted on the mastoid portion of the temporal and 



the occipital bones. 

 Nerves Spinal accessory and branches from cervical 



plexus. 

 STERNO-HYOID. 



Origin Posterior surface of manubrium and inner 



end of clavicle. 

 Insertion Inferior border of anterior part of os 



hyoides. 



Nerve Descendens noni. 

 STERNO-THYROID. 



Origin Posterior surface of manubrium. 

 Insertion Oblique line on thyroid cartilage. 

 Nerve Descendens noni. 

 THYRO-HYOID. 



Origin Oblique line at side of thyroid cartilage. 



