taVNS

Non-invasive write · writes

Auricular transcutaneous vagus-nerve stimulation delivers electrical current through skin-surface electrodes at the cymba conchae, concha or tragus, targeting the auricular branch of the vagus nerve. Reported fMRI responses include the ipsilateral nucleus tractus solitarius through vagal projections. Examples use 10 or 25 Hz stimulation; one 10 Hz protocol used 0.3 ms pulses. A dissection of 14 ears from seven cadavers found vagal-branch innervation at the cymba conchae in every specimen. This anatomical pattern describes innervation, not the fraction of fibres recruited by stimulation.

Spatial resolution

8 mm

Temporal resolution

40–100 ms

Reads

n/a

Writes

cutaneous electrical pulses

Destructive?

non-destructive

Prerequisites

other: Placement of skin-surface electrodes on the ear (cymba conchae, concha, or tragus) over auricular-branch-of-vagus-nerve-innervated skin.

Description

Auricular transcutaneous vagus-nerve stimulation delivers electrical current through skin-surface electrodes at the cymba conchae, concha or tragus, targeting the auricular branch of the vagus nerve. Reported fMRI responses include the ipsilateral nucleus tractus solitarius through vagal projections. Examples use 10 or 25 Hz stimulation; one 10 Hz protocol used 0.3 ms pulses. A dissection of 14 ears from seven cadavers found vagal-branch innervation at the cymba conchae in every specimen. This anatomical pattern describes innervation, not the fraction of fibres recruited by stimulation.

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