RAPID-EYE-MOVEMENT (REM) sleep is associated with intense neuronal activity, ocular
saccades, muscular atonia and dreaming 1,2 . The function of REM sleep remains elusive and …

In rats, the firing sequences observed in hippocampal ensembles during spatial learning are
replayed during subsequent sleep, suggesting a role for posttraining sleep periods in the …

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 positron …

Background Mechanisms of anesthesia-induced loss of consciousness remain poorly
understood. Resting-state functional magnetic resonance imaging allows investigating whole-…

This study used positron emission tomography (PET) to identify the brain substrate of self-referential
reflective activity and to investigate its relationship with brain areas that are active …

The medial prefrontal cortex (MPFC) appears to play a prominent role in two fundamental
aspects of social cognition, that is, self-referential processing and perspective taking. However, …

Slow wave sleep (SWS) is associated with spontaneous brain oscillations that are thought to
participate in sleep homeostasis and to support the processing of information related to the …

Background A major challenge in the management of severely brain-injured patients with
altered states of consciousness is to estimate their residual perception of the environment. …

Background The minimally conscious state (MCS) is a recently defined clinical condition; it
differs from the persistent vegetative state (PVS) by the presence of inconsistent, but clearly …

Background: The aim of the present study was to describe the distribution of regional cerebral
blood flow during the hypnotic state (HS) in humans, using positron-emission tomography (…