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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

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