Franz, Sensations Following Nerve Division. 21 g 



pain or in a pressure-like sensation was determined as accurately as 

 possible. Once the general line was found, I went carefully over 

 all the hairs within a centimeter of the line and mapped out the exact 

 area in which plucking did not result in pressure-like or in pain 

 sensations. Within the areas F and G, I found none of the hairs to 

 be sensitive to plucking. Throughout this area and below G, the 

 usual pressure-like and pain sensations were not produced by pulling 

 the hairs, even when two or more hairs were pulled out with their 

 roots. In area E the plucking of only a very few hairs on the upper 





Fig. 2. 



Fig. 2. — Diagram of upper inner part of forearm. Horizontal areas G, F. 

 and E were insensitive to plucking of hairs. Below G pressures were not 

 felt, likewise traction and brushing of hairs. Horizontal areas A, B, and C 

 had all forms of sensibility intact. Areas E, F, and G were sensitive to 

 brushing of hairs. 



border of some of the squares resulted in sensations, while stimulation 

 of some of the hairs at the lower border of area D was not accom- 

 panied by the proper kind of sensation. The extent of the lack of 

 proper sensations in the hairs may then be said to be in the horizontal 

 areas E, F and G. Although the plucking of hairs in area E was not 

 accompanied by a normal sensation of pain and the pressure-like sen- 

 sation, such as are produced by plucking the hairs over normal parts, 

 when several, say five or six, were pulled at one time a feeling of 

 an indefinable (to the patient) character was obtained. The subject 



