- Peripheral Nervous System—Upper Extremity 47
DRAWING 3-9 Radial Nerve — Partial
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)
Posterior cord
Axillary
nerve
Triceps
Elbow
group
C5 - C8
Deltoid &
teres minor m.
Upper, middle, Spiral groove Elbow
& lower trunks
Axilla