STRUCTURE, ACTION, AND THOUGHT. 763 



schoolboy trick by bending the wrist forcibly inward, and thus 

 mechanically stretching the extensor tendons of the fingers. ^ In 

 this picture the action of the serratus magnus muscle in drawing 



Fig. 15.— The Fall of Man. (After Raphael's picture in the Loggia of the Vatican, Rome.) 

 The position of Eve's left arm illustrates the action of the fifth cervical nerve, and that 

 of her left hand the commencement of action of the first dorsal nerve. The position of 

 Adam's left arm shows the action of the sixth cervical. The action of the hallux is well 

 shown in Eve's right and Adam's left foot. 



forward the shoulder and rotating the scapula so as to raise the 

 shoulder is well seen, and the action of the muscle appears almost 

 exaggerated. We have already found that it gets a branch from 



