- Peripheral Nervous System—Upper Extremity 49
DRAWING 3-10 Radial Nerve — Complete
Ventral rami &
brachial plexus
Upper arm Forearm Hand
Triceps
(C6-C8)
Elbow group
(C5-C8)
Brachioradialis (C5, C6)
Brachialis (partial) (C5-C7)
Extensor carpi radialis
(longus & brevis) (C6, C7)
Anconeus (C6 - C8)
Supinator
(C6, C7)
Extensor carpi ulnaris
Abductor pollicis longus
(C7, C8) Extensor indicis proprius
Extensor digitorum communis
Extensor digiti minimi
Extensor pollicis longus
Extensor pollicis brevis
Posterior cord
Axillary
nerve
Triceps
Posterior cutaneous nerves to arm
and forearm & lower lateral
cutaneous nerve of arm
Elbow
group
Supinator
Posterior interosseous nerve
Superficial radial
nerve (cutaneous)
C5 - C8
Deltoid &
teres minor m.
Upper, middle, Spiral groove Elbow
& lower trunks
Axilla
Finger & thumb extensors
(C7, C8)
Finger & thumb extensors
Extensor carpi ulnaris &
abductor pollicis longus