Fragment Delivering Aroma Stimulus during Whole Night Sleep Can Effectively Enhance Sleep Quality
|關鍵字:||睡眠品質;芳香精油;薰衣草;腦電波;α頻帶;δ頻帶;Sleep quality;Aroma essential oil;Lavender;EEG;Delta power;alpha power|
實驗結果發現在受測者自我評估問卷部分，睡眠安穩度有顯著增加而睡眠擾動度有顯著下降；在睡眠階段分布顯示，精油撥放對整體深層睡眠比例與時間都有顯著的增加。在腦波分析上，觀察到代表深層睡眠δ波(0-4 Hz)在深層睡眠的能量因為精油刺激有顯著加強；且在清醒期階段上，代表清醒的α頻帶(8-13 Hz)和β頻帶(15-30 Hz)的能量都有明顯的顯著減弱。由此可推論出，在睡眠中施放薰衣草精油不但能改善主觀的睡眠品質，更能有效加強相對應睡眠腦波頻帶能量，進而增加深層睡眠的程度和時間，減少睡眠清醒期的程度和時間。|
Past studies have proven that aromatherapy before sleep can help people relax, and thus effectively improving the sleep quality. However, subjects might claim to have experienced an improved quality of sleep, if they are aware of the aromatherapy taking place. Previous studies revealed that the olfactory system still works during sleep, and is the only human sense that bypasses the thalamus, which controls the function between sleep and wake. Hence, presenting aroma stimulus during sleep is an effective way to eliminate the self-psychological biases, and does not make the sleep arousal. In order to understand and evaluate the benefits of the essential oil with the quality of sleep, this study organizes the experiments, with and without discharging the lavender aroma essential oil during sleep, and several physiological signals are recording simultaneously. The sleep questionnaires are given before and after experimental night to assess the self-reported sleep quality. The self-reported sleep quality at the experimental night has a significant improvement in the terms of less sleep disturbance and sleep well. The ratio and length of slow wave sleep (SWS) at the experimental night also has the significant increase. The results from the EEG power spectrum activities show the large delta power (0-4 Hz) in non-rapid eye movement stage 3, in contract, the less alpha power (8-13 Hz) and beta power (15-30 Hz) in wake stage at experimental night. In conclusion, this study suggests that exposing the lavender aroma essential oil during sleep not only effectively improve the sleep quality in self-report, but enhance the deep sleep related EEG power activity during sleep, and thus increase both degree and duration of deep sleep and less the length of awake.