Musculocutaneous Motor Nerve - recording the Biceps

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Musculocutaneous Motor Nerve - recording the Biceps

Last updated on Tuesday, October 6 2009 by blondarb

Origin: C5-6 roots, upper trunk and lateral cord of the brachial plexus, Musculocutaneous nerve.

Recording Site: Biceps muscle

Reference Site: Distal upper arm

Ground: Upper arm

Stimulation Site: Axilla and Erb’s point.

Procedure: The recording electrode is placed over the belly of the biceps muscle. The reference electrode is placed on the upper arm just above the elbow. Stimulation occurs in the axilla, just beneath the tendon. Additional stimulating sites include Erb’s Point.

Related images:

Musculocutaneous Motor Nerve - recording the Biceps
This cartoon shows the technique for studying the Musculocutaneous Motor Nerve - recording the Biceps.

Musculocutaneous Motor Nerve Conduction Study - recording the Biceps, Stimulating at Axilla
This photograph illustrates the technique for a musculocutaneous motor nerve conduction study. The recording electrode (G1, black) is placed over the belly of the biceps muscle. Stimulation occurs in the axilla, just beneath the tendon.

Musculocutaneous Motor Nerve Conduction Study - recording the Biceps, Stimulating at Erb's point
This photograph illustrates the technique for a musculocutaneous motor nerve conduction study. The recording electrode (G1, black) is placed over the belly of the biceps muscle. The proximal stimulation site is at Erb's point.