574 



SPINAL NERYES. 



Fig. 289. The Suprascapular, Circumflex, and Musculo-spiral 

 Nerves. 



Suprct-Sntfula 



Circumflex 



along the ulnar side of the wrist and hand, supplies the inner side of the littlo 

 finger, and the adjoining sides of the little and ring fingers ; it also sends a com- 

 municating filament to that branch of the radial nerve which supplies the adjoining 

 sides of the middle and ring fingers. 



The articular filaments to the wrist are also supplied by the ulnar nerve. 

 The superficial palmar branch supplies the Palmaris brevis, and the integument 

 on the inner side of the hand, and terminates in two digital branches, which are 

 distributed, one to the ulnar side of the little finger, the other to the adjoining 



sides of the little and ring 

 fingers, the latter com- 

 municating with a branch 

 from the median. 



The deep palmar branch 

 passes between the Abduc- 

 tor and Flexor brevis 

 minimi digiti muscles, and 

 follows the course of the 

 deep palmar arch beneath 

 the flexor tendons. At 

 its origin, it supplies the 

 muscles of the little finger. 

 As it crosses the deep part 

 of the hand it sends two 

 branches to each interos- 

 seous space, one for the 

 Dorsal and one for the 

 Palmar interosseous mus- 

 cle, the branches to the 

 second and third Palmar 

 interossei supplying fila- 

 ments to the two inner 

 Lunibrical muscles. At its 

 termination between the 

 thumb and index-finger, it 

 supplies the Adductor pol- 

 licis and the inner head of 

 the Flexor brevis pollicis. 

 The MUSCULO-SPIEAL 

 NERVE (fig. 289), the largest 

 branch of the brachial 

 plexus, supplies the mus- 

 cles of the back part of the 

 arm and forearm, and the 

 integument of the same 

 parts, as well as that of 

 the hand. It arises from 

 the posterior cord of the 

 brachial plexus by a com- 

 mon trunk with the cir- 

 cumflex nerve. At its 

 commencement, it is placed 

 behind the axillary and 

 upper part of the brachial 

 arteries, passing down in 

 front of the tendons of the 

 Latissimus dorsi and Teres 

 major. It winds round 



'otte rio r-Tutcrcsiz -jus 



