Mechanisms and Functions of Brain Oscillations during Human Non-Rapid-Eye-Movement (NREM) Sleep: a Functional Neuroimaging Approach

在人类睡眠期间，大脑功能的特点是大量神经元的节律性活动。这些节律性活动--也称为大脑振荡--可以在睡眠期间通过放置在头皮上的电极来检测(通过脑电或EEG)。睡眠的大脑振荡主要是在被称为非快速眼动睡眠(NREM)的睡眠阶段产生的，约占成年人总睡眠的75%。睡眠期间大脑振荡的两种主要类型被描述：称为睡眠纺锤波的起伏振荡和称为慢波的高幅度振荡。

During sleep in humans, brain function is characterized by rhythmic activities of large numbers of neurons. These rhythmic activities - also called brain oscillations - can be detected through electrodes placed on the scalp during sleep (with an electroencephalogram, or EEG). Brain oscillations of sleep are mostly produced during a sleep stage called non-rapid-eye-movement (NREM) sleep, which accounts for approximately 75% of total sleep in adults. Two main types of brain oscillations during sleep are described: waxing-and-waning oscillations called sleep spindles, and high amplitude oscillations called slow waves.