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Extensor Indicis

Last updated on Monday, April 27 2009 by blondarb

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Muscle Name: extensor indicis

AKA:  musculus extensor indicis

Abbreviation:  EIP

Spinal Nerve Roots:

Brachial Plexus Trunks:
    middle trunk
    lower trunk

Brachial Plexus Cords:
    posterior cord

Named Nerves:
    radial nerve

Proximal Attachment:  ulna

Distal Attachment:  Index finger (extensor hood)

Action:  extends index finger, wrist

Needle Insertion:  In the pronated forearm, three centimeters proximal to the styloid process.

Activation for EMG:  Extend the index finger.