186 STUDIES IN ELECTRO-PHYSIOLOGY: 



Fig. 96. 

 Before contraction. 



Fig. 97. 

 During contraction. 



whereas, I take it, what really happens is this, roughly : - 



Fig. 98. 

 Before contraction. 



Fig. 99. 

 During contraction. 



For this to occur it is not at all necessary for the fibres 

 to be transversely striated as voluntary muscle is striated. 

 All that is required is that they should possess something 

 of the nature of an elastic sarcolemma and the external 



