音刺激提示後に出現する睡眠紡錘波に関する検討(自然科学篇)

概要

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Sleep spindles during sleep stage 2 were measured using the automatic spindle analyzer to examine the effect of the tone stimulus on the appearance of spindle waves. All-night polygraphic sleep recordings were made on six norml human male subjects for four consecutive nights. The fourth night was used as the experimental night, and tone stimuli (62.5 dB(A), 50 msec, 500/1,000Hz) were presented over the night at 30〜40 sec ISI. The third night was used as the baseline night, and the tone stimulus was not presented, but only the stimulus marks were recorded on the chart and used as the pseudo-stimulus. There were no significant differences in spindle rate per minute among the baseline night and the experimental night. However, the spindle appearance rate within 2.5 sec after the tone stimulus was significantly elevated in the experimental night compared to the baseline night. And the frequency of spindle waves detedted after the tone stimulus was faster than the other spindles. There were no significant differences in the spindle duration. The relation between the spindle and the K-complex, and the possible function of the spindle appearance in the sleep process were discussed. And some kinds of spindles and/or spindle-wave-like activities were compared and the importance of measuring the frequency of spindle waves was discussed for the study of the sleep spindle activity.
白梅学園短期大学の論文