Vivid dreams can be a symptomatic presentation of mental illness. This type of dream feels real. Learn how they may not ...

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 ...

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 ...

Researchers at McGill University found that a blood test originally designed for Alzheimer’s can predict dementia risk in people with idiopathic REM sleep behavior disorder (iRBD). The test identified ...