OUR FACE FROM FISH TO MAN 



branch a twig from the main facial division of the 

 seventh nerve (Fig. 24). Thus what are called 

 the mimetic or facial muscles of mammals arose 

 by the forward migration and subdivision of a 

 muscle formerly covering the neck. For this doc- 



FiG. 24. Diagram Showing the Chief Branches of 

 THE Facial Nerve. 



A. Gorilla. (After Ruge.) B. Man. (After Weisse.) 



trine the anatomists Ruge and Huber have 

 brought forward the most detailed and convincing 

 evidence. Thus while mammals were exposed to 

 cruel lacerations of the tender facial muscles, these 

 same muscles became of great use in moving the 

 lips, in closing the eyes, in moving the external 

 ears and finally, in the apes and man, as a means 



of expressing emotion. 



44 



