One of the longest nerves in the body is known as the vagus nerve (VN). The VN is the 10th pair of cranial nerves that originates at the brain stem in the medulla oblongata. This nerve is part of the parasympathetic nervous system, which is a part of the ANS. Research suggests ear acupuncture can activate the VN.
Katherine Altneu, LAc, MSOM, FABORM
Katherine Altneu, a graduate of Southwest Acupuncture College, is the owner and clinic director of "The Point" acupuncture & holistic medicine clinic in Denver, Colo. She is also a professor at  the Colorado School of Traditional Chinese Medicine, a member of the American Board of Reproductive Medicine and a certified yoga instructor.