CURRENT OF ACTION 181 



Tlie current of action may be considered as inclusive of tlie 

 current of injury. Injury is stinuilation, or, conversely, stinuda- 

 tion is a temporary injury. Therefore, the current produced by 

 an injury confined to a small area should be weaker than that 

 obtained by the excitation of the whole muscle. The E.M.F, of 

 the current of action of a sartorius is about 0-085 volts, while the 

 demarcation current may be about 0-053 volts. The diphasic 

 current of action is of short duration, while the monophasie current 

 of injury continues as long as the muscle lives in an injured 

 condition. 



Further Reading 



Hill. "' Living Machinery." Bell. 



Hill. In "" Certain Aspects of Biochemistry." University of London Press. 



Evans. Chapters in " Recent Advances in Physiology." J. and A. Churchill. 



