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Extensor Digitorum Communis

Last updated on Monday, April 27 2009 by blondarb

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Muscle Name: extensor digitorum communis

AKA:  musculus extensor digitorum

Abbreviation:  EDC

Spinal Nerve Roots:

Brachial Plexus Trunks:
    middle trunk
    lower trunk

Brachial Plexus Cords:
    posterior cord

Named Nerves:
    radial nerve

Proximal Attachment:  lateral epicondyle (common extensor tendon)

Distal Attachment:  2nd and 3rd phalanges

Action:  extension of hand and fingers

Needle Insertion: With the forearm supinated the needle is placed four centimeters distal to the olecrenon, three centimeters above the ulna.

Activation for EMG:  Extend the middle finger.