102 [May 15, 



vessels about 2 inches above tbe bend of the arm. In the course of 

 about half an hour the nerve became paralysed, and the following 

 symptoms were observed. 



Motory Symptoms. The thumb was incapable of flexion at the 

 last joint, but could be flexed on the metacarpal bone, so as to be 

 brought in contact with the tips of the three first fingers, but not 

 with that of the little finger. There was considerable stiffness of 

 the thenar muscles, particularly of the abductors. The index and 

 median fingers remained slightly flexed, but by an effort of the will 

 they could be straightened and could perform all movements of ad- 

 duction arid abduction. The index could only be made to flex very 

 slightly, but the median could be completely flexed. The annular 

 and little fingers retained all their movements, but felt weak. 

 Flexion of the entire hand on the forearm was imperfect, and the 

 muscles of the external part of the forearm felt very stiff. 



Sensory Symptoms. The thumb and two first fingers felt cold 

 and numb, and nearly insensible, but when pressed, a sensation of 

 heat was experienced. The insensibility at the tips of the thumb 

 and two first fingers was nearly complete when objects were brought 

 in contact with them. Numbness of the skin existed at the ante- 

 rior part of the forearm. Right hand> Left hand 



Cent. Cent. 



Temperature between index and thumb 20 '4 



Temperature between index and median at roots 



of fingers 26*5 34*3 



Temperature between median and annular .... 25*3 34*8 



Some minutes after pressure was removed and motor power had 

 returned, while there still remained some numbness and insensibility 

 of the fingers, the Right hand< Left hantL 



Cent. Cent. 



Temperature was between index and median fingers 2 7' 2 



between median and annular .... 25 '3 



A quarter of an hour later : 



Temperature between index and median fingers .28*0 34 '3 



between median and annular .... 26*8 34'5 



Twelve o'clock : 



Temperature between index and median 27*6 



between median and annular .... 27' 2 



