EEG changes with progression of qigong practice

Changes in EEG with progression of Qigong training were studied for six trainees at three, eight and twelve months after the first lesson. The measurements were performed on three different methods of quiet Qigong. Although the effective amplitude of the occipital alpha waves did not change so much, the ratio of the frontal to the occipital alpha waves tended to increase with months passed and at the 12th month, it became larger during Qigong than in resting. The lag time of alpha waves between the frontal and the occipital region was shorter at the 3rd month. The case that the value becomes short is while concentrating on some task. The frequency of alpha waves became slower at the 12th month. These results were considered to show that the subjects concentrated at the beginning because of a tension caused by the test and learning the Qigong procedure and then they gradually became able to practice easily.