Non-invasive access to the vagus nerve central projections via electrical stimulation of the external ear: fMRI evidence in humans
Stimulating the vagus-supplied cymba conchae activated the nucleus of the solitary tract, locus coeruleus and other vagal brain areas, unlike earlobe stimulation.
The Effectiveness of Auricular Acupressure on Chronic Musculoskeletal Pain: A Systematic Review and Meta-Analysis of Randomized Controlled Trials
Auricular acupressure gave short-term pain relief in chronic musculoskeletal pain; longer-term effects remain unclear.