MEDIAN NERVE AND BRANCHES. 



275 



a. The branch to muscles of the thumb (*) supplies the outer half of the 

 short flexor, and ends in the abductor, and opponens pollicis muscles. 



b. The digital nerves ( 5 ) are five in number. Three of them, which 

 are distributed to the sides of the thumb and the radial side of the fore 

 finger, are undivided, and come from the external of the two pieces into 



Fig. 83. 



DISSECTION OF THE SUPERFICIAL VESSELS AND NERVES OF THE PALM OF THE HAND WITH soj 

 OF THE SUPERFICIAL MUSCLES. (Illustrations of Dissections.) 



Muscles : 



A. Abductor policis. 



c. Flexor brevis. 



D. Adductor policis. 



H. Palmaris brevis. 

 Arteries: 



a. Trunk of uluar, and &, of radial. 



c. Superficial volar branch. 



d. Superficial palmar arch. 



e. Branch uniting the arch with / the radial 



digital branch of the forefinger. 

 g. Four digital branches of the superficial arch. 



Nerves : 

 1. Ulnar, and 2, its two digital branches. 



3. Median, and 5, its digital branches to 



three fingers and a half. 



4. Branch of the median to some muscles 



of the thumb 



5. Communicating branch from the median 



to the ulnar. 



which the trunk of the median splits. The other two spring from the in- 

 ner piece of the nerve, and are bifurcated to supply the opposed sides of 

 the middle and fore, and the middle and ring fingers. 



The first two nerves belong to the thumb, one being on each side, and 

 the most external is said to communicate with branches of the radial nerve. 



