I can provide links to studies, but what I'm looking for are any experiences PWP have had with this.
Vagus Nerve Stimulation on Ear with TENS ... - Cure Parkinson's
Vagus Nerve Stimulation on Ear with TENS Unit Improves HRV, Sleep, Depression, & More?
I have not tested it, but I found a PD study on short term effects of electrostimulation (Vagus nerve inlcuded):
"Rapid Alleviation of Parkinson’s Disease Symptoms via Electrostimulation of Intrinsic Auricular Muscle Zones"
ncbi.nlm.nih.gov/pmc/articl...
Some mouse study indicate that you should not use too low frequency:
" Low-frequency vagal nerve stimulation leads to impaired vagus nerve function and inhibition of the dopamine system in brain structures (Ziomber et al., 2012). Considering that low- and high-frequency electrostimulation have different outcomes on the autonomic nerve system and on neurotransmitters (Cakmak et al., 2008, 2016; Zhao, 2008), high-frequency stimulation of the Arnold branch of the vagus nerve may in fact have the opposite effect. The present study used 130 Hz stimulation, which is very high compared with the frequency (0.5 Hz) that inhibits the dopaminergic system via vagus nerve stimulation (Ziomber et al., 2012). Therefore, the beneficial bilateral effects obtained in the present study may also be derived from improved dopamine levels."