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Extensor Digitorum Brevis


- Anatomy:
    Origin: the forepart of the supralateral surface of the Calcaneus;lateral talocalcaneal ligament and cruciate crural ligament;
    Insertion: braches into 3 tendons that insert into the lateral sides of the tendons of EDL of 2nd, 3rd, & 4th toes at the level 
             of the MTP joint;
    Action: extends the proximal phalanges of the 2nd, 3rd, and 4th toes.
    Nerve Supply: Deep peroneal, L4, L5, S1; (See Innerv. Musc. Lower Limb)
    Synergist: Extensor digitorum longus;

- Discussion:
    - w/ certain modifications and exceptions, the muscles and fasciae of foot are comparable to those of the hand;
    - w/ no counterpart in upper limb, the extensor digitorum brevis on dorsum sends a tendon to each of the four medial toes



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

Last updated by Data Trace Staff on Monday, December 5, 2011 4:41 pm