Extensor Carpi Radialis Brevis Muscle
Origin: Lateral epicondyle of the humerus
Insertion: Dorsal surface of the base of the third metacarpal
Actions: Extension of the wrist
Innervation: Radial nerve (C6, C7)
Blood Supply: Radial recurrent artery from the radial artery
Primary Actions of the Extensor Carpi Radialis Brevis
1. Extension of the wrist
Agonists:
- Extensor Carpi Radialis Brevis
- Extensor Carpi Ulnaris
Antagonists:
- Flexor Carpi Radialis
- Palmaris Longus
- Flexor Carpi Ulnaris
Extensor digitorum, extensor digiti minimi, and extensor pollicis longus assist with extension of the wrist.
2. Radial Deviation of the wrist
Agonists:
- Extensor Carpi Radialis Longus
- Flexor Carpi Radialis
Antagonists:
- Flexor Carpi Ulnaris
- Extensor Carpi Ulnaris
Extensor pollicis brevis and abductor pollicis longus assist with radial deviation of the wrist
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For Additional Information See: Extensor Carpi Radialis Brevis Muscle: Pain In The Back Of The Forearm and Hand
An excellent book for those beginning the study of anatomy. Coloring helps memory retention.
For intermediary anatomy students learning skeletal and muscle structure.
For beginning and intermediary anatomy . Muscle overlays on the human body. Excellent visuals!