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Peroneal Motor Nerve - recording the Tibialis Anterior

Last updated on Wednesday, April 29 2009 by blondarb

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Origin:  L4-L5 roots, sacral plexus, sciatic nerve, peroneal nerve

Recording Site:  Tibialis Anterior muscle (TA)

Reference Site:  Top of Ankle

Ground:  Medial lower leg

Stimulation Sites:  Below the fibular head and knee

Procedure:  The recording electrode is placed over the belly of the TA.  The reference electrode is placed on the top of the ankle.  Stimulation occurs below the fibular head and at the knee, directly under the biceps femoris tendon and parallel to the knee cap.  There should be a minimum of 10cm between the two stimulation sites to accurately compute the conduction velocity.