Sleepwalking is a disorder that occurs when a person walks or does another activity while they are still asleep.

Walking during sleep; Somnambulism

The normal sleep cycle has distinct stages, from light drowsiness to deep sleep. During rapid eye movement (REM) sleep, the eyes move quickly and vivid dreaming is most common.

Each night people go through several cycles of non-REM and REM sleep. Sleepwalking (somnambulism) most often occurs during deep, non-REM sleep (stage 3 or stage 4 sleep) early in the night. If it occurs during REM sleep, it is part of REM behavior disorder and tends to happen near morning.

The cause of sleepwalking in children is usually unknown. Fatigue, lack of sleep, and anxiety are all associated with sleepwalking. In adults, sleepwalking may be associated with:

• Mental disorders
• Reactions to drugs and alcohol
• Medical conditions such as partial complex seizures

In the elderly, sleepwalking may be a symptom of an organic brain syndrome or REM behavior disorders.

Sleepwalking can occur at any age, but it happens most often in children aged 4 - 8. It appears to run in families.

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Sleepwalking Symptoms

Review Date: 06/20/2009
Reviewed By: David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

A.D.A.M., Inc. is accredited by URAC, also known as the American Accreditation HealthCare Commission (www.urac.org)