1050 PHYSIOLOGY 



flow of blood through the pad and a correspondingly higher temperature 

 than on the sound side, the capillaries are contracted so that the pad contains 

 less blood and is paler than on the opposite side. These observations 

 suggest a question whether the whole of the antidromic effects, observed by 

 Bayliss to follow stimulation of sensory nerves, may not really be confined 

 to, or have their chief seat in, the capillaries. It is indeed certain that the 

 closely allied phenomena of herpes zoster and the erythematous eruptions 

 along the course of a nerve, and having their origin in morbid conditions of 

 the nerve or of the posterior root ganglion, are due to changes in the capil- 

 laries or in the tissues immediately around them. This question must 

 however be left for further investigation. 



