C H A P. XL 



MUSCLES OF THE HEAD. 



nfifies of the Forehead. Of the Eye-lid:. Of the Eje.Oftk 

 jfofe. Mufcles of the Jvlouth. Why the Face is the Index to thf 

 Mind* Temporal Mufcles. Mufcla cftbe Neck. Of the Jaw, 

 The Tongue. Mufcles of the Palate, &c* 



THE (kin which covers the head is moved by a 

 fmgle broad mufcle, and one fmall pair. The 

 former of thefe is fitiiated immediately below the com- 

 mon integuments, at the back and fore part of the 

 head, with the intervention of a broad tendon, and is 

 called occipito frontalis. Its effeft is to draw the (kin 

 of the head backwards, to raife the eye-brows, and 

 wrinkle the (kin of the forehead. 



The corrugator fupercilii arifes from the internal an- 

 gular procefs of the os frontis, near its joining with 

 the bones of the face ; it is inferted inro the inferior and 

 inner part of the occipito frontalis, draws the eye-brows 

 towards each other, pulls downwards thefkinofthe 

 forehead, and caufes it to wrinkle, particularly be- 

 tween the eye -brows. 



The mufcles of the ear will "be fpoken of when it 

 becomes neceffary to treat of the organs of hearing. 



The mufcles-of the eye-lids are, the orbicularis pal- 

 pebrarum, which furrounds the eye, and has the effect 

 of (hutting the eye-lids. The upper eye -lid has alfo a 

 mufcle proper to itfelf, called the levator palpebrse fu- 

 perioris, the effect of which is to raife the upper eye- . 

 lid, and confequently to counteract the former. 



The ball of the eye has fix mufcles, four ftrait and 

 two oblique. The ftrait mufcles all rife from the bot- 

 tom 



