A muscle running diagonally across the forearm. Midway along its course, its fleshy belly is replaced by a flat tendon that becomes cord-like at the wrist. It has its origin on the medial epicondyle of the humerus and its insertion at the base of the second and third metacarpals. It is a powerful wrist flexor. It is also involved in wrist abduction and acts as a synergist during elbow flexion.
Subjects: Sports and Exercise Medicine.