抄録
This study examined the effect of sitting positions on cerebral activation for people in bed and analyzed postural significance. The subjects were 30 healthy adults. We recorded their EEGs in α and β band and performed a subjective test in supine and sitting positions with the head of the bed elevated at 30° and 80°. First, measurements were made in the supine position for 5 minutes, and the head of the bed was then elevated. Measurement continued in the sitting position for 15 minutes at 3 stages: Stages 1, 2, and 3. Using the supine position as a baseline, we compared the supine and sitting positions. We also compared the two angles, 30° and 80°. The EEG showed a significant increase at the 80° for all measured regions and intervals, and a partially significant increase was noted at 30°. Comparing the effect of different angles confirmed the significance of 80° at Stages 1 and 2. Moreover retention time of cerebral activation at 80° is longer than that at 30°. The subjective test also confirmed a higher degree of awakening in the sitting position and in a bed at 80°. Consequently, the effect of the sitting position verified cerebral activation.
