The flexor carpi radialis muscle is an extrinsic muscle of the hand found on the anterior forearm. It arises from the medial epicondyle at the elbow to insert on the second metacarpal bone, on the anterior base. It serves to flex the wrist (move it toward the anterior forearm). Generally, a flexor muscle is one that decreases the angle between two bones, as in bending the arm at the elbow; raising the leg toward the stomach as in kicking a football; or bringing the lower leg up toward the thigh. Another flexor muscle will bring the thumb across the palm of the hand.