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Wheeless' Textbook of Orthopaedics
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Forearm Extensors



- See: Flexor muscles of the Forearm:

- Superficial muscles arise from a common tendon attached to the lateral
    epicondyle of the humerus, and divide into lateral and medial groups;
    - Lateral three of these muscles:
            Brachioradialis
            Extensor Carpi Radialis Longus   /   Brevis
    - Medial group:
            Extensor Digitorum   communis
            Extensor Digiti Minimi
            Extensor Carpi Ulnaris
            Anconeus
- Deep muscles on the back of the forearm are:
    - Supinator
    - Abductor Pollicis Longus
    - Extensor Pollicis Longus   /   Brevis
          - latter three muscles to thumb surface in furrow between two groups of superficial muscles;
          - they insert on thumb at base of metacarpal, proximal phalanx, & distal phalanx respectively;

- Extensor Retinaculum:
    - on dorsal side extensor tendons, w/ exception of brachioradialis,
          pass under an extensor retinaculum that holds them close to bone & maintains their
          uniform mechanical relationship to the carpus;




Vascular Anatomy of the Forearm Muscles: A Study of 50 Dissections.
      Plastic and Reconstructive Surgery. 1991 Dec. 88(6). pp 1026-1033.

The extensor retinaculum of the wrist: An anatomical and biomechanical study.
      A. Palmar et al.   J. Hand Surg. Vol 10-B. p 11. 1985.
















Original Text by Clifford R. Wheeless, III, MD.