Extensor carpi radialis brevis
The extensor carpi radialis brevis muscle aids in moving the hand. Specifically, it abducts and extends the hand and the wrist joint. The muscle works in concert with the extensor carpi radialis longus, which is situated nearby. However, the extensor carpi radialis brevis is much shorter and thicker than its longus counterpart. The muscle originates along the lateral supracondylar ridge, and it inserts into the third metacarpal of the hand. Within the palm this is the bone connected to the phalanges of the index finger. The radial artery delivers oxygenated blood to the muscle, and it is also served by the radial nerve. The radial vein assists in draining deoxygenated blood away from the muscle. The muscle can be exercised through standard forearm conditioning. This includes motions that resist the muscle's full extension. Typically, such strength training involves hand weights and reverse wrist curling. This works for not only the extensor carpi radialis brevis muscle, but it is also effective for all the other extensor muscles in the forearm.
Written and medically reviewed by the Healthline Editorial Team
In Depth: Extensor carpi radialis brevis