着座姿勢が眠気に及ぼす影響に関する実験的研究

We have investigated the effects of stable posture on sleepiness. In a magnetic shielded room, we used real car seats and monitors. Twelve subjects who have much experiences of driving participated in the tests. Torso angles set in 26, 36, and 46 degrees. We measured three postures correspond to the relative angles for each subject. Electroencephalogram, eye movement, electro-oculogram, and skin potential activity were recorded continuously during forty minutes. The correlation between the stable posture and the drowsiness level has been discussed. It was found that sitting posture exerts an influence upon human's sleepiness. Some results are presented in the form of parametric plots and tables.