- 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