Transcutaneous nerve stimulation via the tragus: are we really stimulating the vagus nerve?

Transcutaneous nerve stimulation via the tragus: are we really stimulating the vagus nerve?
Research on transcutaneous vagus nerve stimulation (tVNS) is accumulating. Several studies now assessed whether stimulating the auricular branch of the vagus nerve (ABVN) affects cognitive, emotional and neurological processes, similarly to the invasive stimulation of the vagus nerve at the cervix. Currently, the main areas that are targeted during auricular stimulation are the cymba concha and the tragus [1]. Recently, Badran et al. [2] published an important study on the brain activation patterns associated with tragus stimulation, showing that tragus stimulation was associated with stronger activation in afferent vagal cerebral areas compared to sham stimulation. ... read more
Brain Stimulation Journal FeedBy Andreas M. Burger, Bart Verkuil