Sleep is a universal, essential biological process. It is also an invaluable window on
consciousness. It tells us that consciousness can be lost but also that it can be regained, in …

Sleep is typically considered a state of disconnection from the environment, yet instances of
external sensory stimuli influencing dreams have been reported for centuries. Explaining …

Dreams take us to a different reality, a hallucinatory world that feels as real as any waking
experience. These often-bizarre episodes are emblematic of human sleep but have yet to be …

Whether we are awake or asleep is believed to mark a sharp divide between the types of
conscious states we undergo in either behavioural state. Consciousness in sleep is often …

Post-traumatic stress disorder (PTSD) is a severe psychiatric disorder in which traumatic
memories result in flashbacks and nightmares. With one-third of patients not responding to …

Previous experiments combining cognitive techniques and sleep disruption have been
relatively successful in inducing at-home lucid dreams (LD) over training periods of 1 week …

Dream research has advanced significantly over the last twenty years, thanks to the new
applications of neuroimaging and electrophysiological techniques. Many findings pointed …

Background Anaesthetic-induced unresponsiveness and non-rapid eye movement (NREM)
sleep share common neural pathways and neurophysiological features. We hypothesised …

Recently, cortical correlates of specific dream contents have been reported, such as the
activation of the sensorimotor cortex during dreamed hand clenching. Yet, despite a close …

Sleep is a brain state characterised by a low vigilance level and diminished consciousness.
Reaction to and processing of external stimuli is attenuated in sleep. During sleep, the …