Neuroanatomy Draw It To Know It

3. Peripheral Nervous System—Upper Extremity 45

DRAWING 3-8 Ulnar Nerve — Complete

Ventral rami &

brachial plexus

Upper arm Forearm Hand

Intrinsic hand group

Lumbricals (3,4)

Palmar interossei

Dorsal interossei

Palmaris brevis Thenar group

Flexor pollicis brevis

Adductor pollicis

Forearm muscle group

Flexor carpi ulnaris

Flexor digitorum

profundus (4,5)

Hypothenar group

Abductor digiti minimi

Opponens digiti minimi

Flexor digiti minimi

Medial

cutaneous

nerve of

the arm

Medial

cutaneous

nerve of

the forearm

Superficial branch (sensory

except palmaris brevis)

Intrinsic hand group

Hypothenar group

Deep

branch

Forearm muscle group

Palmar ulnar

cutaneous nerve

Dorsal ulnar

cutaneous nerve

Guyon’s

canal

Palmaris

brevis muscle

Thenar group

Cubital tunnel

Medial cord

(C8 -T1)

Lower trunk