title: Electrodermal mapping: A new technology.
abstract: OBJECTIVE
  To provide the first objective data to show that the electrical conditions of an acupuncture point and a non acupuncture point are different.
  
  
  METHODS
  A newly developed multi-channel skin resistance measuring system is used to characterize the variability in electrical resistance measurements in and around an acupoint, a non-acupoint and a scar. The system measures the electrical skin resistance at 48 points, both absolutely and continuously. The study was performed at the Medical University of Graz in 10 male volunteers, aged between 20 and 30 years and of eurocaucasian descent. With software developed along with the hardware, both a high-resolution measurement and a graphical presentation of possible changes in electrical resistance in the region of interest are possible.
  
  
  RESULTS
  Using the new electrodermal mapping system, differences in skin resistance of an acupoint, a non-acupoint and around a scar could be observed. The values varied within a range of up to 100-500 kOhm. Thermography measurements for control reasons in the same spot did not show these changes.
  
  
  CONCLUSIONS
  Electrodermal mapping is an innovative method for highly precise skin resistance measurements.
authors.affiliation: Gerhard Litscher, Lu Wang, Xin-Yan Gao, Ingrid Gaischek, TCM Research Center Graz and Research Unit of Biomedical Engineering in Anesthesia and Intensive Care Medicine, Medical University of Graz, 8036 Graz, Austria.
authors.forename: Gerhard
authors.initials: G
authors.lastname: Litscher
authors.affiliation: Gerhard Litscher, Lu Wang, Xin-Yan Gao, Ingrid Gaischek, TCM Research Center Graz and Research Unit of Biomedical Engineering in Anesthesia and Intensive Care Medicine, Medical University of Graz, 8036 Graz, Austria.
authors.forename: Lu
authors.initials: L
authors.lastname: Wang
authors.affiliation: Gerhard Litscher, Lu Wang, Xin-Yan Gao, Ingrid Gaischek, TCM Research Center Graz and Research Unit of Biomedical Engineering in Anesthesia and Intensive Care Medicine, Medical University of Graz, 8036 Graz, Austria.
authors.forename: Xin-Yan
authors.initials: XY
authors.lastname: Gao
authors.affiliation: Gerhard Litscher, Lu Wang, Xin-Yan Gao, Ingrid Gaischek, TCM Research Center Graz and Research Unit of Biomedical Engineering in Anesthesia and Intensive Care Medicine, Medical University of Graz, 8036 Graz, Austria.
authors.forename: Ingrid
authors.initials: I
authors.lastname: Gaischek
keywords: Acupuncture point; Complementary medicine; Electrical skin resistance; Electrodermal mapping; Scar