• Brachioradialis
  • Extensor carpi radialis longus
  • Extensor carpi radialis brevis
  • Extensor digitorum
  • Extensor digiti minimi
  • Extensor carpi ulnaris
  • Anconeus
MuscleActionOriginInsertionInnervationBlood supply
Brachioradialis- Assists with flexion of elbow when forearm in mid-pronation
- Proximal 2/2 of lateral supracondyle ridge of humerus- Lateral surface of distal radius- Radial nerve: C5,6,7
- Radial recurrent artery
Extensor carpi radialis longus- Extends and abducts wrist- Lateral supracondylar ridge of humerus- Base of 2nd metacarpal- Radial nerve: C6,7- Radial artery
Extensor carpi radialis brevis- Extends and abducts wrist
- Lateral epicondyle of humerus- Base of 3rd metacarpal- Radial nerve: C7,8- Radial artery
Extensor digitorum- Extends digits 2-5
- Extends wrist
- Lateral epicondyle of humerus- Extensor expansions of medial four digits- Posterior interosseous nerve: C7,8- Recurrent and posterior interosseous arteries
Extensor digiti minimi- Extends 5th digit- Lateral epicondyle humerus- Extensor expansion of 5th digit at metacarpophalangeal and interphalangeal joints- Posterior interosseous nerve: C7,8- Recurrent interosseous artery
Extensor carpi ulnaris- Extends and adducts wrist- Lateral epicondyle of humerus
- Posterior border of ulna
- Base of 5th metacarpal- Posterior interosseous nerve: C7,8- Ulnar artery
Anconeus- Assists elbow extension
- Stabilises elbow joint
- Abducts ulna during pronation
- Lateral epicondyle of humerus- Olecranon
- Proximal surface of ulna
- Radial nerve: C7,8,T1- Deep brachial artery (middle collateral branch)
- Recurrent interosseous artery