Study of Alpha Waves in EEG under Acupuncture Anesthesia

When EEG waves (the former) in adults are measured with the eyes closed and while physically relaxed, the alpha wave (the rhythm at 8-13 Hz) is derived from the posterior regions of the head. The alpha rhythm (the latter) over large areas of the head is also obtained under acupuncture anesthesia. Both wave modulations which are treated as the same alpha rhythm, but they differ each other. When chaos analysis is applied to both waves, both have fractal structure and periodicity, but the attractor of the latter is more stable than that of the former. When the EEG rhythm obtained from each electrode is compared, based on the same time axis, the former partially show the characteristic pattern and th latter data have overall synchronization. These results show that the sensory system response decreases due to the acupuncture anesthesia.