Hypnagogic hallucinations occur during the transition from wakefulness to sleep, specifically in stages 1 and 2 of deep sleep, without reaching the REM stage. In other words, these hallucinations ...

(That said, hallucinations of some kind may still occur from sleep deprivation alone.) The record holders from the Guinness ...

waking "sleep," hallucinations, autonomic disturbances suggestive of sympathetic overdrive (tachycardia, hypertension, hyperhidrosis, hyperthermia), a rise in circulating catecholamine levels ...

Two days without sleep can cause you to start losing your grip on reality. Hallucinations worsen, and you might even undergo depersonalization. That's the feeling that reality is slipping away ...

There are key differences between narcolepsy and insomnia. Learn about ways to manage these sleep disorders to improve your health and well-being. Insomnia is a common sleep disorder characterized ...

New research reveals disturbing nightmares and hallucinations may serve as early warning signs of lupus, potentially helping patients receive treatment sooner.

“If we follow middle-aged people into older age, those who sleep more at more consistent times from day-to-day have lower risk of cancer, heart disease, dementia, and overall mortality,” Wu says. “So ...

Researchers at McGill University found that a blood test originally designed for Alzheimer’s can predict dementia risk in ...