324 MOVEMENTS OF THE 



flexors of the fingers may have a firm origin. If still more force 

 be needed the latissimus and teres major spring into action to 

 support the humerus and rhomboid to hold the scapula. To 

 make a strong pull one pushes against the table with the other 

 arm and brings the extensors of the trunk into action, and finally 

 if this does not suffice, the legs are braced and the whole body is 

 converted by muscular action into a single solid piece in order 

 that the flexors of the fingers may exert all their power to open 

 the drawer." This description by Bowen shows clearly the 

 complexity of an apparently simple action. The student will 

 note too that as more muscles are called upon, the lever is length- 

 ened and the position of the fulcrum altered. 



