Atlas of Human Anatomy by Netter

Approachable through axilla

All the rest of the nerve branches from brachial plexus

Ulnar nerve supplies

Flexor carpi ulnaris

Medial half of FDP

Hypothenar muscles

Third and fourth lumbricals

All interossei muscles

Skin over the medial hand and 1½ digits

Median nerve supplies

Forearm flexors (except flexor carpi ulnaris and the lateral half of flexor digitorum profundus)

Thenar muscles and first and second lumbricals

Skin over the lateral hand and 3½ digits

Musculocutaneous nerve supplies

Flexor muscles of arm (anterior compartment)

Skin over lateral aspect of forearm (lateral antebrachial cutaneous)

Radial nerve supplies

Triceps

Anconeus

Extensor muscles of forearm

Skin over posterior arm and forearm

Axillary nerve supplies

Teres minor

Deltoid

Shoulder joint

Skin over inferior deltoid

Dermatomes and Cutaneous Innervation of the Upper Limb

[Plate 401, Dermatomes of Upper Limb]