The extensor carpi radialis longus is one of the five main muscles that control movements at the wrist. (myobuddy.com)
The superficial layer has 4 muscles, the pronator teres, flexor carpi radialis, palmaris longus, and the flexor carpi ulnaris. (all-about-arm-exercises.com)
It is found deep to the brachioradialis, extensor carpi radialis longus and brevis, and extensor digitorum. (kingofthegym.com)