Flexor carpi ulnaris

  • The flexor carpi ulnaris (or flexor carpi ulnaris muscle, latin: musculus flexor carpi ulnaris) is a long, superficial muscle of the forearm that belongs to the anterior muscle group and is situated in the first layer.

    Origin

    The flexor carpi ulnaris as the pronator teres originates with two heads: humeral and ulnar.

    The humeral head originates from the medial epicondyle of the humerus, but the ulnar head of the flexor carpi ulnaris originates from the medial margin of the olecranon of the ulna.

    Insertion

    The flexor carpi ulnaris muscle descends vertically and inserts onto the pisiform bone.

    Action

    The functions of the flexor carpi ulnaris are flexion and adduction of the hand.

    Innervation

    The flexor carpi ulnaris is innervated by the ulnar nerve.