中文摘要：

目的 人的睡眠是有节律的,浅睡眠和深睡眠反复交替进行,分析浅睡期脑电波的变化对研究睡眠效率和睡眠质量至关重要.本文通过分析低频光刺激下睡眠过程中脑电波的变化,研究人在浅睡期脑电波对光刺激的响应,进而探讨外部光刺激对睡眠过程中脑电波的影响.方法 利用美国Neuroscan型脑电图仪采集10例志愿者的光刺激睡眠和正常睡眠的脑电数据.首先,利用时频分析对睡眠过程中的脑电信号进行分期,获得浅睡期脑电信号,然后对分期后的脑电信号做傅里叶变换,获得各频段脑电波,并求其能量.最后比较并分析了志愿者在光刺激（5 Hz）和正常睡眠下浅睡期的脑电信号能量.结果 在低频光刺激下,浅睡期脑电波的波能量明显高于正常睡眠,尤其在中央区和顶区增加明显.结论 在光刺激下大脑皮质以更平稳的方式进入抑制状态,有助于更好地进入深睡期.

英文摘要：

Objective Light sleep and deep sleep alternate iteratively during the sleep. It is important to analyze the change of EEG during the light sleep for the research of sleep efficiency and quality. The EEG response during the light sleep under photon stimulation is studied by analyzing the EEG change in this paper in order to explore the impact of photon stimulation on sleep EEG. Methods Ten volunteers＇ EEG of photon stimulation and normal sleep are gained by Neuroscan. Firstly, the EEG data of light sleep are obtained by using time-frequency analysis. Secondly, the EEG with different frequency is gained by processing the data with Fourier transform, and then the energy of EEG is calculated. Finally, the light sleep EEG energy in normal sleep and photon stimulation （5 Hz ）sleep is compared. Results The EEG theta rhythm energy under photon stimulation is obviously higher than normal sleep, especially in central and parietal region. Conclusions Cerebral cortex enters the inhibition state with a more stable way under photon stimulation,which is helpful for deep sleep.