This study examines the individual reproducibility of alterations of subjective, objective, and
EEG measures of alertness during 27 h of continuous wakefulness and analyzes their …

This review examines recent advances in the study of brain correlates of consciousness.
First, we briefly discuss some useful distinctions between consciousness and other brain …

Descent into sleep is accompanied by disengagement of the conscious brain from the
external world. It follows that this process should be associated with reduced neural activity …

The function of rapid-eye-movement (REM) sleep is still unknown. One prevailing
hypothesis suggests that REM sleep is important in processing memory traces. Here, using …

In humans, weak transcranial direct current stimulation (tDCS) modulates excitability in the
motor, visual, and prefrontal cortex. Periods rich in slow-wave sleep (SWS) not only facilitate …

We recorded the magnetoencephalographic (MEG) signal from three subjects before, during
and after eye movements cued to a tone, self-paced, awake and during rapid eye movement …

Sleep is regulated by homeostatic mechanisms, and the low-frequency power in the
electroencephalogram (delta power) during non-rapid eye movement sleep reflects …

Consciousness never fades during waking. However, when awakened from sleep, we
sometimes recall dreams and sometimes recall no experiences. Traditionally, dreaming has …

Oscillations of the local field potentials (LFPs) or electroencephalogram (EEG) at
frequencies below 1 Hz are a hallmark of the slow-wave sleep. However, the timing of the …

Eight subjects were kept awake and active overnight in a sleep lab isolated from
environmental time cues. Ambulatory EEG and EOG were continuously recorded and …