On the Effects of Constant Galvanic Currents. 341 



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On the Effects of Constant Galvanic Currents upon the Mammalian 

 Nerve-Muscle and Reflex Preparations. 

 By Kjlnshi Sassa, M.D., Tokio. 



(Communicated by C. S. Sherrington, Pres. R.S. Received July 8, 1921.) 



(From the Physiological Laboratory, Museum, Oxford.) 



My experiments were to study the reflex effects resulting from stimulation 

 by constant galvanic currents applied to an afferent nerve of the hind limb. 

 The main points of enquiry have been : (1) the relation between reflex excita- 

 tion and inhibition of the decerebrate tonus of the vasto-crureus ; (2) whether 

 the " excitation formula " (Pfliiger's law) holds good in mammalian afferent 

 nerves ; and (3) whether there is continuous excitation during the passage of 

 the current through an afferent nerve. 



The reflex effects thus produced in the extensor muscle are complex and 

 various, and are difficult to analyse without accurate knowledge of the results 



