Table 1.

Average voltage of skin sympathetic nerve activity in normal healthy volunteers

Electrode location	CPT				VM
	Baseline	CPT	Recovery	N	Baseline	VM	Recovery	N
V1	0.77±0.07	1.2±0.29*,†	0.79±0.02	9	1.25±0.20	3.66±0.82*,†	1.21±0.19	8
V2	0.85±0.08	1.21±0.16*,†	0.86±0.07	9	1.00±0.17	3.91±0.74*,†	0.95±0.17	8
V3	1.07±0.38	1.24±0.28*,†	1.15±0.52	9	1.04±0.17	3.56±0.81*,†	0.96±0.20	8
V4	0.78±0.01	1.04±0.05*,†	0.84±0.10	9	0.85±0.06	4.01±1.00*,†	0.85±0.06	8
V5	1.00±0.40	1.44±0.59*,†	1.13±0.26	9	1.01±0.15	4.28±0.99*,†	1.04±0.14	8
V6	0.77±0.04	1.37±0.33*,†	0.84±0.07	6	0.79±0.15	4.69±0.92*,†	0.78±0.17	6
Unipolar wrist (C2)	3.23±0.81	4.21±0.98	3.38±0.27	3	4.89±1.08	4.96±0.07	1.67±0.21	2
Bipolar RA-LA (C1)	1.50±0.20	4.68±0.10*,†	2.07±0.25	4	2.06±0.66	4.59±0.74*,†	2.62±1.14	4
Bipolar Finger-finger (C2)	1.27±0.01	1.28±0.01ǂ	1.28±0.01	3	1.29±0.01	1.30±0.00	1.30±0.02	2
Bipolar Arm-arm (C3)	2.36±0.77	2.90±0.83	2.58±0.68	2	2.60±1.03	3.24±1.06*,†	2.44±1.06	2
Bioplar RA-LL (C1)	0.95±0.02	1.56±0.08*	1.18±0.09	4	1.48±0.67	4.58±1.23*,†	1.74±0.95	4
Bioplar RA-LL (C2)	1.32±1.46	2.08±0.30*,†	1.35±0.07	3	1.59±0.13	2.19±0.24	1.92±0.35	2
Bioplar RA-LL (C3)	1.72±0.13	2.41±0.12*,†	2.04±0.15	2	0.93±0.65	3.13±2.25	1.00±0.72	2

All data expressed as average SKNA in μV± standard error. The filter setting was 500 Hz high pass.

N=number of patients studied in the lead configuration for the particular maneuver

C1–C3, configuration 1–3 as shown in Figure 1 of the online supplement

^*p<0.001 vs baseline,

^†p<0.001 vs recovery,

^ǂp<0.05 vs baseline.