Facts about Extensor carpi radialis
- 07
Repetitive gripping activities in golf and racquet sports selectively hypertrophy the extensor carpi radialis longus by up to 15 percent compared to untrained individuals.
- 06
Surgical repair of extensor carpi radialis tendon injuries requires reattachment within 72 hours to prevent permanent loss of wrist extension function and grip strength.
- 05
Wrist extension actions like gripping a tennis racket primarily recruit the extensor carpi radialis longus over the brevis due to its insertion on the second metacarpal bone versus the third.
- 04
During wrist extension, the extensor carpi radialis longus generates approximately 40 percent greater force output than its brevis counterpart due to its longer muscle belly and superior mechanical advantage.
- 03
Both the extensor carpi radialis longus and brevis originate from the lateral epicondyle of the humerus, making them key muscles in tennis elbow syndrome when overuse causes inflammation.
- 02
Innervation of the extensor carpi radialis longus originates from the C6 and C7 nerve roots via the posterior interosseous nerve branch of the radial nerve.
- 01
The extensor carpi radialis longus and brevis muscles together produce approximately 180 degrees of wrist extension force in human forearm biomechanics.