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What are REM and Non-REM Sleep?

Stage 2: You are in light sleep. Stages 3: This is the deep sleep stage. During the deep stages of NREM sleep, the body repairs and regrows tissues...

Sleep Apnea Tests and Diagnosis

If you have symptoms of sleep apnea, your doctor may ask you to have a sleep apnea test, called a polysomnogram (PSG). Similar, more portable equip...

Physical Side Effects of Oversleeping

Many people with hypersomnia experience symptoms of anxiety, low energy, and memory problems as a result of their almost constant need for sleep. O...

Periodic Limb Movement Disorder

Periodic limb movement disorder (PLMD) is repetitive cramping or jerking of the legs during sleep. PLMD movements are not myoclonus, however, and t...

Insomnia

Insomnia is a sleep disorder in which you have trouble falling and/or staying asleep. If it’s hard for you to do everyday activities because you’re...

Dreams

Dreams can be entertaining, disturbing, or downright bizarre. But you have your most vivid dreams during a phase called REM (rapid eye movement) sl...

Sleep Habits Assessment

Harvard Medical Center: 'Twelve Simple Steps to Improve Your Sleep.'. University of Maryland Medical Center: 'Sleep Hygiene.'. Susan Zafarlotfi, Ph...

Sleep-Related Eating Disorders

People with this disorder eat while they are asleep. NS-RED and NES differ, in that people with NES eat when they are conscious.

Obstructive Sleep Apnea (OSA)

Obstructive sleep apnea is when something blocks part or all of your upper airway while you sleep. Obstructive sleep apnea usually happens when the...

Snoring

Snoring is noisy breathing while you sleep. Your partner might be the person who tells you that you snore. Snoring can itself be a symptom of a hea...

Could Your Child Have Sleep Apnea?

Breathing temporarily pauses during sleep for more than 10 seconds in adults and longer than two breath cycles in children, and this can happen up ...

Narcolepsy

Narcolepsy is a neurological disorder that affects your ability to wake and sleep. Risk factors for narcolepsy include your age. People with narcol...