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Gastrocnemius - Medial Head

Last updated on Saturday, June 20 2009 by blondarb

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Muscle Name: gastrocnemius - medial head


Abbreviation: MG

Spinal Nerve Roots:
    lumbosacral plexus

Named Nerves:
    tibial nerve

    sciatic nerve

Proximal Attachment:  Medial condyle of the femur.

Distal Attachment:  Calcaneus

Action: Plantar flexes the foot and flexes the knee.

Needle Insertion: Into the posteromedial aspect of the calf muscle approximately 10-12 centimeters distal to the medial aspect of the knee.

Activation for EMG:  Have the patient plantar flex the foot. The patient may have be able to activate the muscle easier if the knee is bent.

Pitfalls:  This can be a very difficult muscle to activate.


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