FrontalCortex, Inc. is a non-profit corporation dedicated to neurology education.

Extensor Digitorum Longus

Last updated on Wednesday, June 17 2009 by blondarb

peer review status unavailable
rating unavailable

Muscle Name: extensor digitorum longus

AKA:  musculus extensor digitorum longus

Abbreviation: EDL

Spinal Nerve Roots:


    lumbosacral plexus

Named Nerves:
    deep peroneal nerve

    common peroneal nerve

    sciatic nerve

Proximal Attachment:  Lateral Condyle of tibia and superior portion of interosseous membrane

Distal Attachment:  Middle and distal phalanges of lateral four digits

Action: Extension of the four lateral toes, some eversion of the foot.

Needle Insertion: In the anterior leg approximately 6 centimeters distal to the tibial tubercle and 3 centimeters lateral to the tibialcrest. If the needle is inserted directly posteriorly it must be inserted through the tibialis anterior by approximately 2 centimeters. Alternatively the needle may be inserted more laterally and directly into the muscle belly.

Activation for EMG:  Have the patient extend their toes.

Pitfalls:  If the needle is too medial or superficial the tibialis anterior will be sampled. If the needle is too lateral the peroneous longus will be sampled.


Categories (tags) users associate with this resource what is this?
Click on a tag to find related images, videos, MCQs, and other resources.
Check the boxes next to the tags you consider relevant or enter your own tags in the field below.
You must be logged in to edit tags.
Top 5 tags for this item:
No tags have been created yet for this resource.
Please type in an appropriate tag for this item
more tags:
new tag:

0 user entries
Please log in if you'd like to add a comment.