246 DETAILED SYNTHESIS. 



495. Inf. Four strong muscles upon each side assist in mastica- 

 tion, several of minor importance assisting in drawing the jaw downward. 



496. THE OBBICULABIS PALPEBBAEUM is composed 

 of fasciculi, that extend from the inner angle of the eye, 

 sweeping round the lids of that organ and by contrac- 

 tion closing it, most of the contraction taking effect upon 

 the upper lid, which is raised by a special muscle extend- 

 ing from the bottom of the socket. 



497. THE OTHER MUSCLES OF THE FACIUM, as their 

 illustrations show, extend from various points to the 

 nose or to the mouth, producing motion of those parts. 



498. THE OBBICULABIS OEIS (circular of the mouth) 

 is usually described as if its fasciculi entirely surrounded 

 the mouth. It would be better if it were described as 

 extending from the angles of the mouth, where it is 

 blended with the fibres of other muscles, to the central 

 line of the lips, where there is always a thin partition 

 tendon dividing the muscle distinctly into right and left. 



499. Remark. THERE ARE OTHER MUSCLES within the mouth, eye- 

 socket, and ear, to be described in connection with those organs. 



Muscles of the Neck. 



500. THE MUSCLES OF THE NECK MAY BE CLASSED as 

 adapted to move the head and neck on the spinal col- 

 umn, to raise the shoulders, to control the action of the 

 mouth and throat, and to act upon the larynx. 



501. THE STEBNO-MASTOID (neck-cord) is the most 

 conspicuous muscle of the neck, extending from the ster- 

 num to the mastoid process just back of the ear. Its 

 contraction draws the ear toward the sternum and moves 

 the head accordingly. Both muscles, acting at the same 

 time, draw the head directly forward. (See Fig. 178.) 



602. Remark. The other muscles bending the head are small, and, 

 for the most part, lie close to the column, as shown by the illustrations. 



495. How many muscles raise jaw ? 496. Describe . 497. What said of ? 

 498. Describe -. 499. Whore -? 500. How ? 501. Describe -. 



