TOUCH. 



191 



1 



Muscles of the hand. a, back view, i, front view* 



fingers. The mechanism for moving the thumb is 

 somewhat different from that of the fingers. The 

 most important muscles of the thumb those which 

 bend it in opposition to the fingers could not have 

 been fixed in the arm, as the required motion is 

 across the palm. These muscles are accordingly 

 'laced around the inner ball of the thumb, forming 



T 3 



