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Steve Chamberlin,Agatha P. Colbert,Adrian Larsen 사단법인약침학회 2011 Journal of Acupuncture & Meridian Studies Vol.4 No.1
The clinical practice of recording skin conductance (SC) at acupuncture points (acupoints), as a diagnostic and/or therapeutic monitoring aid may have scientific merit. However, influences of age, gender and time of day on these recordings are unknown and it is unclear whether SC at acupoints differs from SC levels in general (as reported in psychophysiology research). This paper summarizes SC data obtained with the AcuGraph 3 Digital Meridian Imaging System between June 2005and March 31, 2010. An initial dataset of 117,725 SC examinations was scrubbed to include only the first SC examination on individual patients and exclude potentially faulty data. The final dataset consists of SC recordings at the 24 Source (Yuan) acupoints in 8637 patients, collected by 311 practitioners. Twelve left/right average conductance measures and an overall average of the 24 acupoints were assessed. Statistical analyses included two sample t tests, three way analyses of variance and linear regression. Results indicate that mean SC at acupoints, similar to SC in general,is higher in males, higher in afternoons and declines with age. Not previously reported, the rate of SC decline with age differs at different acupoints between males and females. These findings have substantial implications for acupuncture research and practice.
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Agatha P. Colbert,Adrian Larsen,Steve Chamberlin,Carrie Decker,Heather C. Schiffke,William L. Gregory,Tran Thong 사단법인약침학회 2009 Journal of Acupuncture & Meridian Studies Vol.2 No.4
Electrodermal screening (EDS) is based on three commonly held assumptions: acupuncture points (APs) have lower electrical resistance than non-APs; resistance at APs varies with health and disease; and effective acupuncture treatments are associated with normalization of resistance at APs. Although evidence confirming these assumptions is limited, EDS is frequently practiced worldwide. Researchers are also beginning to assess EDS’ utility as an outcome measure in acupuncture trials. Fundamental in developing EDS as a research tool is the need for an accurate and reliable measurement. We developed an automated multichannel prototype system, the Octopus, and recorded electrical resistance and capacitance at eight skin sites in 33 healthy participants over 2 hours. The Octopus accurately measured against known resistors (within 2.5% of the mean value) and capacitors (within 10% of the mean value), and yielded repeatable readings at all eight skin sites: LR 1 (r = 0.79), SP 1 (r = 0.79), toe non-AP (r = 0.77), LU 9 (r = 0.97), PC 6 (r = 0.96), wrist non-APs (r = 0.97), SP 6 (r = 0.96), and leg non-APs (r = 0.97). Resistance at APs was significantly lower than the nearby non-APs in one out of three comparisons. Electrodermal screening (EDS) is based on three commonly held assumptions: acupuncture points (APs) have lower electrical resistance than non-APs; resistance at APs varies with health and disease; and effective acupuncture treatments are associated with normalization of resistance at APs. Although evidence confirming these assumptions is limited, EDS is frequently practiced worldwide. Researchers are also beginning to assess EDS’ utility as an outcome measure in acupuncture trials. Fundamental in developing EDS as a research tool is the need for an accurate and reliable measurement. We developed an automated multichannel prototype system, the Octopus, and recorded electrical resistance and capacitance at eight skin sites in 33 healthy participants over 2 hours. The Octopus accurately measured against known resistors (within 2.5% of the mean value) and capacitors (within 10% of the mean value), and yielded repeatable readings at all eight skin sites: LR 1 (r = 0.79), SP 1 (r = 0.79), toe non-AP (r = 0.77), LU 9 (r = 0.97), PC 6 (r = 0.96), wrist non-APs (r = 0.97), SP 6 (r = 0.96), and leg non-APs (r = 0.97). Resistance at APs was significantly lower than the nearby non-APs in one out of three comparisons.
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