Spinal Accessory Nerve AKA Accessory Nerve and Cranial Nerve XI
Emerges through sternocleidomastoid muscle, across posterior neck, dives under trapezius
Upon leaving jugular foramen, it has relatively vulnerable subcutaneous course until reaching the trapezius.
Motor: Trapezius

Dr Donald A Ozello DC of Championship Chiropractic in Las Vegas, NV
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