Flexor Carpi Ulnaris

Joe Muscolino

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The flexor carpi ulnaris on the right side of the body. The flexor carpi ulnaris has two heads: humeral head and ulnar head.

The Flexor Carpi Ulnaris is in the Superficial Layer of the Anterior Compartment of the forearm. It is also a member of the Wrist Flexor Group; the muscles of the wrist flexor group are:



  • Medial epicondyle of the humerus via the common flexor belly/tendon to the ulnar side of the anterior hand.
    • The distal attachment is onto the pisiform, hook of the hamate, and the anterior side of the base of the fifth metacarpal.





  1. The flexor carpi ulnaris is one of five muscles of the common flexor belly/tendon that is involved with medial elbow tendinopathy (aka golfer’s elbow).
  2. The flexor carpi ulnaris engages isometrically to stabilize the pisiform whenever the abductor digit minimi manus of the little finger contracts.