Flexor Carpi Ulnaris - Muscle Physiology & Functional Anatomy


Flexor Carpi Ulnaris Muscle




  • Humeral head: Common flexor origin of medial epicondyle.

  • Ulnar head: Aponeurosis from medial olecranon & upper three quarters subcutaneous border of ulna


  • Pisiform, hook of hamate, base of 5th metacarpal via pisohamate & pisometacarpal ligaments

Major Artery:

  • Ulnar artery


Neural Innervation:

  • Ulnar nerve (C8, T1) (with some C7 by communication from lateral cord)


Trigger Points: 

Trigger Points of the Flexor Carpi Ulnaris




Concentric Functions:

  • Flexes and adducts wrist.

  • Fixes pisiform during action of hypothenar muscles

Eccentric Functions:

Isometric Function:

Related Muscles





More Images of the Flexor Carpi Ulnaris Muscle

Palpating the Flexor Carpi Ulnaris

Palpating the Flexor Carpi Ulnaris

More Information about the Flexor Carpi Ulnaris Muscle

The flexor carpi ulnaris muscle works in a muscle synergy with the other forearm flexors.  Ulnar entrapment by the aponeurosis of the 2 heads of the flexor carpi ulnaris muscle can sometimes be the cause of cubital tunnel syndrome.


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