The Extensor Carpi Ulnaris muscle is a powerful wrist extensor and except for the flexor carpi ulnaris is the only muscle involved in wrist adduction.


  • Lateral epicondyle of the humerus


  • Base of the 5th metacarpal (dorsal side)


  • Extension of the wrist
  • Ulnar deviation (adduction) of the wrist


  • Radial nerve

Daily uses

  • Accelerating a motorbike

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