Oblique cord

The oblique cord is an inconstant ligament of the forearm, composed of a small, flattened band, extending downward and lateralward, that separates the origins of the flexor pollicis longus (FPL) and flexor digitorum profundus (FDP) muscles from the supinator muscle and elbow joint.

The oblique cord originate from the lateral side of the tubercle of the ulna at the base of the coronoid process, and insert on the the radius a little below the radial tuberosity.

The fibers run of the oblique cord run in the opposite direction to those of the interosseous membrane. It is sometimes wanting.