Axillary Motor Nerve - recording the Deltoid

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Axillary Motor Nerve - recording the Deltoid

Last updated on Tuesday, October 6 2009 by blondarb

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

Recording Site: Deltoid muscle

Reference Site: Distal upper arm

Ground: Shoulder

Stimulation Sites: Erb’s Point

Procedure: The recording electrode is placed over the lower deltoid where all three heads are close together. The reference electrode is placed on the upper arm just above the elbow. Stimulation occurs at Erb’s Point.

Related images:

Axillary Motor Nerve - recording the Deltoid
This cartoon shows the technique for studying the Axillary Motor Nerve - recording the Deltoid.

Axillary Motor Nerve - Anatomy
A searchable, illustrated tutorial for electromyography (EMG).

Brachial Plexus
A searchable, illustrated tutorial for electromyography (EMG).

Anterior view of the cutaneous nerves of the upper extremity.
Diagram of segmental distribution of the cutaneous nerves of the right upper extremity. Anterior view.

NCS Axillary Nerve Erb's point
Photograph illustrating the motor nerve conduction study of the axillary nerve, stimulating at Erb's point and recording the deltoid.