睡眠時の聴性緩反応に対する刺激時間の影響

概要

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The effect of the duration of tone bursts on the slow vertex response was studied under awake and sleeping conditions. Two kinds of 1, 000Hz tone bursts were used as stimuli. The rise-times, plateaus and decay-times of the tone bursts were 5-32-5msec and 5-2-5msec, respectively. The slow vertex response to the tone bursts was recorded in 6 subjects. Under the awake condition, the N1-P2 amplitudes to the 5-32-5msec tone bursts were significantly larger than those to the 5-2-5msec tone bursts. However, during sleep stage IV, there were no differences in the N1-P2, P2-N2 and N2-P3 amplitudes between the responses to the two kinds of tone bursts. These results indicated that the positive duration effect observed in the awake condition disappeared in the sleeping condition. The frequency-selectivity of the slow vertex response may not be significantly better than that of early components under the sleeping condition.
耳鼻咽喉科臨床学会の論文