Anterior Branch Median Nerve

Anterior view

Note: Only muscles innervated by ulnar nerve shown

Posterior (dorsal) view

Flexor pollicis brevis muscle (deep head only; superficial head and other thenar muscles supplied by median nerve)

Adductor pollicis muscle

Medial Epicondyle Ulna Nerve

(no branches above elbow)

Inconstant contribution

Medial epicondyle

Articular branch (behind condyle)

Flexor digitorum profundus muscle (medial part only; lateral part supplied by anterior interosseous branch of median nerve)

Flexor carpi ulnaris muscle

(drawn aside)

Adductor pollicis muscle

Dorsal branch of ulnar nerve

Palmar branch

^Superficial branch Deep branch

Common palmar digital nerve

^Communicating branch of median nerve with ulnar nerve

Palmar and dorsal interosseous muscles

-3rd and 4th lumbrical muscles (turned down)

Proper palmar digital nerves (dorsal digital nerves are from dorsal branch)

Dorsal branches to dorsum of middle and distal phalanges

(no branches above elbow)

Inconstant contribution

Medial epicondyle

Articular branch (behind condyle)

Flexor digitorum profundus muscle (medial part only; lateral part supplied by anterior interosseous branch of median nerve)

Flexor carpi ulnaris muscle

(drawn aside)

Dorsal branch of ulnar nerve

Palmar branch

^Superficial branch Deep branch

-Palmaris brevis -Abductor digiti minimi

-Flexor digiti minimi brevis > Hypothenar muscles Opponens digiti minimi

Common palmar digital nerve

^Communicating branch of median nerve with ulnar nerve

Palmar and dorsal interosseous muscles

-3rd and 4th lumbrical muscles (turned down)

Proper palmar digital nerves (dorsal digital nerves are from dorsal branch)

Dorsal branches to dorsum of middle and distal phalanges

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