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Extensor carpi radialis brevis
Other Terms:
Musculus extensor carpi radialis brevis,
Muscle court extenseur radial du carpe
Muscle parts
None
Latin name
Musculus extensor carpi radialis brevis
Latin muscle parts
None
Group
Antebrachial muscle – posterior compartment – lateral group
Etymology
In English this muscle’s name is the short muscle on the radial side that straightens the wrist. The word extensor comes from the Latin ex meaning “out from” and tendere meaning “to stretch.” Carpi is the genitive form of the Latin carpus meaning “wrist.” Radialis is used in reference to the muscle’s position on the radial side of the forearm. This term comes from the Latin radius meaning “a rod or spoke,” which is the shape of the bone. The term brevis is Latin for short and is typically used when there is a similar muscle that has the same name but is longer.
Origin
Lateral epicondyle of humerus via common extensor tendon and radial collateral ligament
Insertion
Posterior surface at the base of the 3rd metacarpal bone
Action
Extension of the wrist; abducts (radial deviation) the wrist
Nerve supply
Radial nerve (C7 and C8)
Blood supply
From proximal to distal, the muscle receives blood from the radial collateral artery, the radial recurrent artery, the recurrent interosseous artery, and the posterior interosseous artery.
Latin
Musculus extensor carpi radialis brevis
French
Muscle court extenseur radial du carpe
