Neuroanatomy Draw It To Know It

3. Peripheral Nervous System—Upper Extremity 43

DRAWING 3-7 Ulnar Nerve — Partial

Ventral rami &

brachial plexus

Upper arm Forearm Hand

Forearm muscle group Palmaris brevis

Flexor carpi ulnaris

Flexor digitorum

profundus (4,5)

Medial

cutaneous

nerve of

the arm

Medial

cutaneous

nerve of

the forearm

Superficial branch (sensory

except palmaris brevis)

Deep

branch

Forearm muscle group

Palmar ulnar

cutaneous nerve

Dorsal ulnar

cutaneous nerve

Guyon’s

canal

Palmaris

brevis muscle

Cubital tunnel

Medial cord

(C8 -T1)

Lower trunk