ELECTRO-PHYSIOLOGY 



633 



A. 



B. 



PIG. 200. 'SPIKE' (DIPHASIC VARIATION) OF UNINJURED GASTROCNEMIUS 



(SANDERSON). 



A photographed on slow, B on fast-moving plate. 



FIG. 201. VARIATION OP 

 INJURED GASTROCNEMIUS 

 (SANDERSON). 



A ' spike ' followed by a 

 hump.' 



FIG. 202. VARIATION OF INJURED 

 GASTROCNEMIUS (SANDERSON). 



The plnte was n.oving ten times faster 

 than in Fig. 201. 



FIG. 203. VARIATION OF UNIN- 

 JURED MUSCLE EXCITED EIGHTY- 

 FOUR TIMES A SECOND (SANDER- 

 SON). 



FIG. 204. CURVE OF AN INJURED MUSCLE EXCITED 

 SIXTY TIMES A SECOND (SANDERSON). 



