This site is intended for healthcare professionals
General Practice Notebook
Login | Register
Medical search

extensor digitorum muscle (forearm, anatomy)

FREE subscriptions for doctors and students... click here
You have 3 open access pages.

Extensor digitorum is one of the superficial layer of muscles on the extensor surface of the forearm. It arises from the common extensor origin on the anterior aspect of the lateral epicondyle of the humerus. Passing distally, it occupies most of the posterior aspect of the forearm.

It divides into four tendon slips proximal to the wrist. These pass under the extensor retinaculum within a common synovial sheath. The tendons insert into the extensor expansions of the fingers: the middle slip of each tendon supplies the base of the middle phalange; the two outer slips of each tendon pass to bases of the distal phalanges. Tendons to the ring and little fingers often fuse. The contribution to the little finger extensor hood may only be a small slip.

Extensor digitorum extends the:

  • wrist
  • fingers at the metacarpophalangeal and interphalangeal joints

It is supplied by the posterior interosseous nerve, a branch of the radial nerve (C7,C8).

General Practice Notebook
General Practice Notebook
The information provided herein should not be used for diagnosis or treatment of any medical condition. A licensed medical practitioner should be consulted for diagnosis and treatment of any and all medical conditions. Copyright 2016 Oxbridge Solutions LtdĀ®. Any distribution or duplication of the information contained herein is strictly prohibited. Oxbridge Solutions LtdĀ® receives funding from advertising but maintains editorial independence. GPnotebook stores small data files on your computer called cookies so that we can recognise you and provide you with the best service. If you do not want to receive cookies please do not use GPnotebook.