Annual Changes in EEG on Qigong Trainees

EEG change were experimentally studied on qigong trainees for two years. The subjects were one Chinese female (training length was 3 years at the first test) and three Chinese males (do. 2 years, and 18 and 17 months). The qigong method was an internal quiet qigong, Zhen-qi-yun-xing-fa. The occipital alpha wave, as an indicator of relaxation, became large during qigong in the first year, though, the increasing rate was smaller in the second year. The ratio of the alpha amplitude on the frontal region to the occipital region, which is usually large for qigong masters, especially during qigong, did not show any apparent difference between values while resting and during qigong in the first year, although there was some difference with the length of their training period. In the next year, however, the ratio tended to become large during qigong. The alpha frequency became slower in the deep meditation-like state, especially in the second year. The subjects who had very slow alpha waves sometimes showed theta waves around Fz.