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Superficial Muscles, Tendons,
Nerves, and Vessels of the Posterior
Forearm and Dorsum of Hand
Margene Fallon
Superficial Muscle Group
3 Lateral Muscles
•
•



•



Brachioradialis (Flexes elbow)
Extensor carpi radialis longus
(extends wrist; aids in radial flexion of
wrist)
O: lateral supracondylar ridge of
humerus
I: metacarpal II
N: Radial nerve
Extensor carpi radialis brevis (extends
wrist; aids in radial flexion of wrist)
O: Lateral epicondyle of humerus
I: metacarpal III
N: Posterior interosseous nerve
Superficial Muscle Group
4 Posterior Muscles
Originate at Lateral epicondyle of
humerus
• Anconeus (Extends elbow)
 I: Olecranon & posterior surface of
ulna
 N: radial nerve
• Extensor digitorum
 I: Dorsal surfaces of phalanges 2-5
 N: posterior interosseous nerve
• Extensor digiti minimi
 I: proximal phalanx 5
 N: Posterior interosseous nerve
• Extensor carpi ulnaris
•
•
I: base of metacarpal 5
N: posterior interosseous nerve
Watch Out
• Do not sever:
1. Posterior
antebrachial
cutaneous
nerve
2. Extensor
retinaculum
Posterior
antebrachial
cutaneous nerve
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