Franz, Sensations follownig Nerve Division. 123 



the i)aticiit reported jiain sensations produced by draAving his shirt 

 sleeve up above the elbow ; when the arm was pressed, and especially 

 Avhen pressure was exerted along the course of the nerve trunks, 

 the subject felt pains in the fingers and palm, of a radiating char- 

 acter and apparently widespread. 



The results of this study may be summarized as follows: There 

 is a widespread disturbance in touch sensations following injury 

 to the peripheral nerves, not only in the loss of certain forms of 

 sensation but also in the increase of threshold values in much larger 

 areas of the body segment than those in which there is sensation 

 loss. This decrease in sensibility is marked for touch sensations, 

 but is also apparent for the sensations that arise from stimulating 

 the hairs and for the temperature sensations. The hair and tem- 

 perature sensations will be more fully discussed in a subsequent arti- 

 cle. With the exception of the areas in which no pain from 

 pressure was felt, the pain thresholds are not altered, at least not 

 in the same way as those for touch. 



Note : — Tlie results of the careful exaniiuatioiis of Dr. H. Head's arm in 

 which the radial nerve was cut for the purpose of testing the sensibility have 

 .inst been received (Rivers and Head: A Human Experiment in Nerve Divi- 

 sion. Brain, 1908, Vol. 31, pp. .32.'>-4.~)0 ) . Owing to the recent appearance of 

 this work, a note of the main features of difference cannot be added to the 

 present article, but will be included as part of the second artice of the series. 



[Received for publication, December 5, 1908.] 



