STIMULATION OF MUSCLE AND NERVE 129 



nerves. For painless motor stimulation it is, 

 therefore, necessary to increase the strength of 

 the current which reaches the muscle or motor 

 nerve and to diminish the density of the current 



M. inteross. dors. IV 

 M. abd. digit, rain. 



M. ext. poll, brevis 

 M. abd. poll, longus 



M. ext. indicis propr. 

 M. ulnaris extern. 



M. rad. ext. brevis 



M. rad. ext. longus - 

 M. supin. longus- 



M. ext. pollicis longus 

 M. ext. indicis propr. 



M. ext. dig. min. propr 

 M. ext. dig. communis 



M. supin. brevis 



Fig. 36. The motor points on the posterior surface of the forearm and 

 hand. 



at the electrodes. These ends are accomplished 

 by using for electrodes large metal plates cov- 

 ered with sponge or cotton wet with saline solu- 

 tion. The liquid diminishes greatly the resistance 

 of the epidermis, so that more current reaches 



9 



