Extensor Carpi Ulnaris- Muscle Physiology & Functional Anatomy


Extensor Carpi Ulnaris Muscle




  • Common extensor origin on anterior aspect of lateral epicondyle of humerus


  • Base of 5th metacarpal via groove by ulnar styloid

Major Arteries:


Neural Innervation:

  • Posterior interosseous nerve


Trigger Points: 

Trigger Point for the Extensor Carpi Ulnaris




Concentric Functions:

  • Extends & adducts the hand at the wrist

Eccentric Functions:

Isometric Function:

Related Muscles




More Images of the Extensor Carpi Ulnaris Muscle

How to palpate the extensor carpi ulnaris

Extensor Carpi Ulnaris Muscle

More Information about the Extensor Carpi Ulnaris Muscle

In addition to its primary function of wrist extension & adduction the extensor carpi ulnaris muscle acting alone inclines the hand towards the ulnar side (side of little finger) and by its continued action it extends the elbow-joint.


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