Laser-induced evoked potentials in the brain after nonperceptible optical stimulation at the Neiguan acupoint: A preliminary report

Abstract

We report on small but reproducible human cerebral evoked potentials after bilateral nonperceptible laser needle (658nm, 40mW, 500m, 1Hz) irradiation of the Neiguan acupoint (PC6). The results which are unique in scientific literature were obtained in a 26-year-old female healthy volunteer within a joint study between the Medical University of Graz, the Karl-Franzens University of Graz, and the Graz University of Technology. The findings of the 32-channel evoked potential analysis indicate that exposure to laser needle stimulation with a frequency of 1Hz can modulate the ascending reticular activating system. Further studies are absolutely necessary to confirm or refute the preliminary findings. © 2012 Gerhard Litscher et al.