500 



MUSCULAR MOTION. 



Broad Laughter. (Sir Charles Bell.) 



to conceal the eye, and throw 

 wrinkles about the lower eye- 

 lids and temples. In this 

 expression, the whole of the 

 movable features are raised 

 upwards. The orbicularis 

 palpebrarumdoes not partake 

 of the relaxation of the or- 

 bicularis oris. It is excited, 

 so as to contract the eyelids, 

 and sink the eye, whilst the 

 struggle of a voluntary effort 

 of the muscles to open the 

 eyelids, and raise the eye- 

 brow, gives a twinkle to the 

 eye, and a peculiar obliquity 

 to the eyebrow, the outer 

 part of which is most ele- 

 vated. At the same time, 

 the individual holds his sides 

 to control the contractions of the muscles of the ribs. The diaphragm 

 is violently agitated. The same influence spreads to the throat, and 

 the sound of laughter is as distinct as the signs in the face. 



In this movement 



Fig. 206. of expression we have 



an instance of the 

 associated action of 

 different parts, which 

 are considered to be 

 under the influence 

 of the respiratory 

 system of nerves of 

 Sir Charles Bell. The 

 facial expression is 

 under the direction of 

 the portio dura or 

 respiratory nerve of 

 the face. 



In the face of a 

 faun, (Fig. 206,) 

 sketched by Sir 

 Charles Bell, we have 

 the expression of 

 weeping from pain. 

 In the violence of 

 weeping, accompa- 

 nied with lamenta- 

 tion and outcry, the 

 face is flushed or suf- 

 fused from stagna- 



Faun Weeping. (Sir Charles Bell.) 



