244 



DETAILED SYNTHESIS. 



through its centre, dividing into right and left ; hence, 

 though named as if single, it is double. It assists in 

 giving expression. 



FIG 178. 



Fig. 178, side view of 

 muscles of Cranium, Fa- 

 cium, and Neck. 1, ten- 

 don ; 2, front, 5, back of 

 Occipito frontalis; 3, 4, 

 6, muscles of external ear. 

 Beneath 3, temporal faint- 

 ly shown ; 7, Orbicularis ; 

 8, levator ; 9, compressor ; 

 10, levator; 11, buccina- 

 tor (trumpeter); 12, Zy- 

 gomatic; 18, ditto and 

 orbicularis ; 16, masseter ; 

 14, platysma myoides ; 

 17, Sterno Mastoid; 20, 

 trapezium. 



488. THE SUPERCILIARY are situated beneath the 

 eyebrows, extending from the ridge above the nose out- 

 ward. When they contract they corrugate, and draw 

 down the skin covering them. 



489. Remark. The two preceding muscles are the only ones of 

 the Cranium, and as they are only useful in giving expression, they 

 might better be associated with those of the facium. 



490. THREE MUSCLES, ABOVE, IN FRONT, AND BACK 

 OP THE EAR, extend from it to the cranium, moving it 

 when contracted. 



Describe Fig. 173. Which muscles belone to cranium ? face ? neck ? 483. De- 

 ecribe . 469. What said in Remark ? 490. What said ? 



