ANATOMY IN A NUTSHELL. 



103 



sends filaments to the elbow-joint. Near the outer border of the arm and a 



little above the tendon of the Biceps the nerve pierces the deep fascia, anas- 

 tomosing with the proximal external cutaneous branch of the musculo-spiral, 

 passing below the median cephalic vein where it divides into anterior and pos- 

 terior. It then becomes cutaneous. 



The anterior branch passes along the radial side of the forearm to supply 

 the integument on the outer half of the anterior surface, ending in the thenar 

 eminence. It anastomoses with the radial and the palmar cutaneous branch of 



PLAT 



i 



OBLIQUE. LIGAMENT 



POST. LIGAMENT 



The Elbow-Joint — External View 



the median. It gives off an articular branch to the carpal bones which pierces 

 the deep fascia to pass with the radial artery to the back of the wrist. 



The posterior branch is smaller than the anterior one. It passes along the 

 posterior aspect on the radial side of the forearm to the wrist. It anastomoses 

 with the radial and the distal external cutaneous of the musculo-spiral. 



LESSON XXVI. 



The musculo-spiral is the largest branch of the brachial plexus. It mid the 

 circumflex are the terminal branches of the posterior cord. It supplies mus- 

 cles and integument both above and below the elbow . Its libers may be traced 



