INFERIOR CERVICAL GROUP. 179 



Sterno-m axillaris. 



Sterno-thyro-hyoideus. 



Subscapulo-hyoideus. 



Rectus capitis anticus minor. 

 Rectus capitis lateralis. 

 Scalenus. 



Rectus capitis anticus major. Longus colli. 



STERNO-MAXILLARIS. 

 (PL. II. 20.) 



Placed along the lower border of the levator humeri, this 

 muscle is long, narrow, and flat, its fibres extending forwards and 

 upwards ; it is fleshy, terminating in a flat tendon. 



Origin. From the anterior portion of the cariniform cartilage ; 

 it is united to its fellow along its inferior third. 



Insertion. To the angle of the lower jaw. 



Relation. Externally with the panniculus and the parotid 

 gland ; internally with the sterno-thyro-hyoideus and subscapulo- 

 hyoideus, the trachea and carotid artery ; the jugular vein runs 

 along its superior border. 



Action. Acting with its fellow, it flexes the head downwards, 

 or singly, it turns the head to one side. 



STERXO-THYRO-HYOIDEUS. 

 (Sterno-thyroideus and Sterno-hyoideus.) 



(PL. III. 3.) 



This is a slender muscle situated in front of the trachea ; it is 

 narrow, ribbon-shaped, and divided into two parts. Fleshy at 

 its origin, it divides half way up the neck into two portions, each 

 having a tendon of insertion. About their middle the sterno- 

 thyro-hyoidei have tendinous intersections, which render them 

 more or less digastric. 



Origin. From the superior part of the cariniform cartilage, 

 intimately blended with its fellow. 



Insertion. By one tendon, to the postero-inferior part of the 

 thyroid cartilage, and by the other to the spur process of the os 

 hyoides. 



Relation. Inferiorly with the sterno-maxillaris ; superiorly 

 with the trachea. 



Action. It depresses the hyoid bone, and with it the larynx 

 and base of the tongue. 



