extensor carpi radialis longus (muscle)
muscle of posterior (extensor) compartment of forearm; origin, lateral supracondylar ridge of humerus; insertion, posterior aspect of base of second metacarpal bone; action, extends and abducts hand at wrist joint; nerve supply, radial.
Synonym(s): musculus extensor carpi radialis longusTA, long radial extensor muscle of wrist
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