THE PRINCIPLES OF MYODYNAMICS. 



I. Myodynamics treats of the forces of muscles 

 and their effects. 



There are two kinds of Myodynamics. 



1. Myostatics, which treats of muscular f(3rces, 

 when they are in equihbrium with some other 

 force, or forces, — acting on a bony lever. 



II. Myokinetics, which treats of muscular 

 forces, when they are moving some other force, 

 or forces, — acting on a bony lever. 



Examples : — (i.) When the hand- simply holds 

 a weight, — it is a case of myo-statics : (2.) 

 When the hand moves a weight, — it is a case of 

 myo-kinetics. 



2. In myo-dynamics the principles of the 

 Lever, the Parallelogram of Forces, the inclined 



