入眠期研究における行動学的アプローチ

概要

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Behavioral approaches to sleep onset or sleep onset period were reviewed. The previous studies varied in behavioral methods (vigilance method, state perception method, muscular relaxation method and operant behavior method), but they commonly used a mechanical on/off switch or a telegraph key that imposed a serious restriction on the full analyses of behaviors observed at wake/sleep transition. Emphasis was placed on a new behavioral approach that could make minimal the damage on the natural process of sleep onset and facilitate the behavioral measurement of muscular relaxation at wake/sleep transition. Our ongoing study made a continuous behavioral measurement of hand muscle tonus, employing a new behavior detecting system, when the subject regularly paced a certain operant response (switch taps) at wake/sleep transition. The system was composed of four-channel FSR sensors (foot sensing resisters) very sensitive to slight pressure (more than 40g) and an amplifier producing analogue output from every tap response. The preliminary results demonstrated the dynamic relationship of operant behavior deterioration and muscular relaxation at wake/sleep transition, associated with EEG changes, and provided the possible assessment of hand preference (laterality) as well.
神戸親和女子大学の論文