Neurophysiologic effects of transcutaneous auricular vagus nerve stimulation (taVNS) via electrical stimulation of the tragus: A concurrent taVNS/fMRI study and review.
This study looks at taVNS (auricular stim) and the effects on fMRI. They compare tragus stim with lobe stim. The tragus has some reflection of the auricular brancy of the vagus nerve, but from my studies not as much as
