Everyone seems to see the potential for auricular stimulation in lieu of more invasive vagal nerve stimulation. These articles abound. I am still collecting data comparing auricular electrostimulation in conjunction with acupuncture compared to acupuncture alone. So far, I don’t see enhanced vagal activity or stress reduction. As in all aspects of medicine, it’s very individual. Don’t you hate that? I would love to have a definitive answer. full article here
Anatomo-Physiologic Basis for Auricular Stimulation
Introduction: Stimulation of cranial nerves modulates central nervous system (CNS) activity via the extensive connections of their brainstem nuclei to higher-order structures. Clinical experience with vagus-nerve stimulation (VNS) demonstrates that it produces robust therapeutic effects, however, posing concerns related to its invasiveness and side-effects.
Discussion: Trigeminal nerve stimulation (TNS) has been recently proposed as a valid alternative to VNS. The ear presents afferent vagus and trigeminal-nerve distribution; its innervation is the theoretical basis of different reflex therapies, including auriculotherapy. An increasing number of studies have shown that several therapeutic effects induced by invasive VNS and TNS, can be reproduced by noninvasive auricular-nerve stimulation. However, the sites and neurobiologic mechanisms by which VNS and TNS produce their therapeutic effects are not clear yet.
Conclusions: Accumulating evidence suggests that VNS and TNS share multiple levels and mechanisms of action in the CNS.