A study on a new brain activating procedure using transcutaneous xenon light irradiation around the stellate ganglion

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The purpose of this study was to investigate the possibility of transcutaneous xenon light irradiation around the stellate ganglion as a non-invasive brain activating procedure. 53 healthy volunteers who were enrolled in this study underwent two experimental sessions : 1) 10-minute xenon light irradiation around the bilateral stellate ganglions in a suitable supine position (Xe-SGI); 2) 10-minute rest in the same position as Xe-SGI (control). As a result, it becomes obvious that Xe-SGI causes not only sympathetic suppression but also decreased arousal and attention. In conclusion, Xe-SGI can not be used as a non-invasive brain activating procedure.