Table 1. Results of ABVN-SEP, AEP and TrigN-SEP.

		main effect				PD	CTRL
ABVN-SEP	latency [ms]	group	F(3,180) = 2.544	p = 0.058	P1	2.7 ± 0.5	2.8 ± 0.6
		side	F(3,180) = 0.792	p = 0.500	N1	4.5 ± 0.9	4.6 ± 1.0
		group * side	F(3,180) = 0.692	p = 0.558	P2	6.3 ± 1.2	6.1 ± 1.2
		MoCA	F(3,180) = 1.804	p = 0.148
	amplitude[μV]	group	F(2,140) = 0.180	p = 0.835	P1-N1	11.8 ± 12.4	12.1 ± 11.3
		side	F(2,140) = 0.516	p = 0.598	N1-P2	6.8 ± 11.1	6.3 ± 6.4
		group * side	F(2,140) = 0.568	p = 0.568
		MoCA	F(2,140) = 0.491	p = 0.613
AEP	latency [ms]	group	F(5,189) = 0.310	p = 0.906	I	1.8 ± 0.2	1.8 ± 0.2
		side	F(5,189) = 0.316	p = 0.903	II	3.0 ± 0.2	3.0 ± 0.1
		group * side	F(5,189) = 0.445	p = 0.817	III	4.0 ± 0.2	4.0 ± 0.2
					IV	5.3 ± 0.2	5.2 ± 0.2
					V	5.9 ± 0.2	5.9 ± 0.2
TrigN-SEP	latency [ms]	group	F(3,193) = 0.659	p = 0.578	N13	13.9 ± 1.2	13.9 ± 1.0
		side	F(3,193) = 0.564	p = 0.639	P19	20.6 ± 1.6	20.4 ± 1.2
		group * side	F(3,193) = 1.882	p = 0.134	N27	28.1 ± 2.5	27.7 ± 1.5

Results of ABVN-SEP (recording site O1-T3/O2-T4), AEP (A1/2-Cz) and TrigN-SEP (C5/C6-Fz; mean ± SD). The main effect of the MAN(C)OVA for peak latencies and amplitudes is indicated. There were no group differences between groups in the other recordings-sites either after correction for multiple comparisons (ABVN-SEP). PD, patients with Parkinson’s disease; CTRL, healthy control subjects; ABVN-SEP, somatosensory evoked potentials following electric stimulation of the auricular branch of the vagus nerve; AEP, auditory evoked potentials; TrigN-SEP, somatosensory evoked potentials following electric stimulation of the trigeminal nerve.