THE BRACHIAL PLEXUS 



135 



forearm, from the elbow to the wrist. These two branches 

 overlap one another to such an extent that section of one of 

 them alone produces no discoverable alteration in the 



FIG. 63. The Nerve-supply of the Skin on the Anterior Aspect 

 of the Upper Limb. 



A. The individual nerves of supply. 



B. The segmental supply. 



1. Posterior supraclavicular nerves. 



2. Lateral cutaneous nerve of arm. 



3. Dorsal cutaneous nerve of forearm. 



4. Lateral cutaneous nerve of forearm. 



5. Palmar branch of radial nerve. 



6. Digital branches of median nerve. 



7. Digital branches of ulnar nerve. 



8. Palmar branch of ulnar nerve. 



9. Palmar branch of median nerve. 



10. Medial cutaneous nerve of forearm. 



11. Medial cutaneous nerve of arm. 



12. Intercosto-brachial nerve. 



sensibility of the limb. Further, the dorsal branch overlaps 

 the dorsal cutaneous nerve of the forearm (lower external 

 cutaneous branch of the musculo-spiral nerve), but the volar 

 branch does not overlap the volar branch of the medial 



