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Definition: muscle of posterior (extensor) compartment of forearm; origin, lateral epicondyle of humerus; insertion, by four tendons into the bases of the middle and distal phalanges; action, extends fingers, especially at metacarpophalangeal joint; nerve supply, radial (posterior interosseous).
Synonym(s): musculus extensor digitorumTA, extensor (muscle) of fingers, musculus extensor digitorum communis
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