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Extensor Carpi Ulnaris

Last updated on Monday, April 27 2009 by blondarb

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Muscle Name: extensor carpi ulnaris

AKA:  musculus extensor carpi ulnaris

Abbreviation:  ECU

Spinal Nerve Roots:
    C7
    C8

Brachial Plexus Trunks:
    middle trunk
    lower trunk

Brachial Plexus Cords:
    posterior cord

Named Nerves:
    radial nerve

Proximal Attachment:  Common extensor tendon (lateral epicondyle), ulna

Distal Attachment:  5th metacarpal

Action:  extends and adducts the wrist

Needle Insertion:  Just distal to the midpoint of the ulna in the pronated arm.

Activation for EMG:  Have the patient extend the arm and deviate toward the ulna.

Pitfalls:  

Notes: