Extensor carpi radialis longus muscle

Extensor carpis radialis longus (ECRL) is a muscle of the superficial layer in the posterior compartment of the forearm. It passes through the 2nd extensor compartment of the wrist. It is one of the three muscles forming the mobile wad of Henry. It is one of the extrinsic muscles of the hand.


  • origin: lateral supracondylar ridge of humerus, lateral epicondyle of humerus, lateral intermuscular septum of arm
  • insertion: base of second metacarpal on its posterior surface
  • arterial supply: radial recurrent artery
  • innervation: radial nerve (C6, C7)
  • action: extension and abduction of the wrist joint
Anatomy: Upper limb

Anatomy: Upper limb

Article information

rID: 39871
Section: Anatomy
Tag: cases, refs
Synonyms or Alternate Spellings:
  • ECRL
  • Extensor carpis radialis longus
  • ECRL muscle

Support Radiopaedia and see fewer ads

Cases and figures

  • Figure 1: extensor compartments of the wrist
    Drag here to reorder.
  • Updating… Please wait.

     Unable to process the form. Check for errors and try again.

     Thank you for updating your details.