Electrical Potential of Acupuncture Points: Use of a Noncontact Scanning Kelvin Probe

Table 1

Topographic characteristics of electrical potential scans.

Location	Scan parameters
	Mean; (mean ± SE, mV)	Standard deviation	Range; (mean ± SE, mV)
Dorsal hand
LI-4	135.1 ± 24.2	18.7 ± 1.8	80.8 ± 9.2
LI-4 control	139.0 ± 24.8	12.5 ± 0.9	52.7 ± 4.8
𝑃 value	0.73	0.002	0.0005
Volar wrist
PC-6	138.1 ± 29.3	16.2 ± 2.8	66.0 ± 9.2
PC-6 control	138.4 ± 34.8	17.4 ± 1.7	76.1 ± 7.9
𝑃 value	0.79	0.27	0.20