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Night Terrors

Night Terrors Overview

The sleep disorder of night terrors typically occurs in children aged 3-12 years, with a peak onset in children aged 3˝ years.
 
Sleep is divided into 2 categories: rapid eye movement (REM) and nonrapid eye movement (non-REM). Non-REM sleep is further divided into 4 stages, progressing from stages 1-4. Night terrors occur during the transition from stage 3 non-REM sleep to stage 4 non-REM sleep, beginning approximately 90 minutes after the child falls asleep.
 
Night terrors are distinctly different from the much more common nightmares, which occur during REM sleep. Night terrors are characterized by frequent recurrent episodes of intense crying and fear during sleep, with difficulty arousing the child. Night terrors are frightening episodes that disrupt family life.  
 
An estimated 1-6% of children experience night terrors. Boys and girls are equally affected. Children of all races also seem to be affected equally. The disorder usually resolves during adolescence.



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Night Terrors

Basics of Sleep Introduction

Sleep is defined as a state of unconsciousness from which a person can be aroused. In this state, the brain is relatively more responsive to internal stimuli than external stimuli. Sleep should be distinguished from coma. Coma is an unconscious state from which a person cannot be aroused. Sleep is essential for the normal, healthy functioning of the human body. It is a complicated physiological phenomenon that scientists do not fully understand.

Historically, sleep was thought to be a passive state. However, sleep is now known to be a dynamic process, and our brains are active during sleep. Sleep affects our physical and mental health, and is essential for the normal functioning of all the systems of our body, including the immune system. The effect of sleep on the immune system affects one’s ability to fight disease and endure sickness.

States of brain activity during sleep and wakefulness result from different activati...

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Read What Your Physician is Reading on eMedicine

Sleep Disorder: Night Terrors »

Sleep disruption is a frequent concern among parents of children aged 2 years or younger. 

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