Sleep terror disorder or “night terrors” is a condition that occurs during stages 3 or 4 of non-rapid eye movement (NREM) sleep. It is characterized by repeated episodes of abrupt awakening, usually with a panicky scream, and accompanied by intense anxiety, confusion, agitation, disorientation, unresponsiveness, marked motor movements, and total amnesia concerning the event.
Night terrors usually occur 1/2 hour to 3 1/2 hours after falling asleep. During these episodes people wake up sweating heavily, their hearts pounding and eyes glazed over, screaming in fear. They are unaware of their surroundings and unresponsive to attempts to comfort them. They may not calm down for 10 or 15 minutes, although they return to sleep quickly once the episode ends.
Generally they do not remember what scared them, but rarely a person will retain a vague image of something terrifying. A few children and adults who experience night terrors will sleepwalk during the episode.
Night terrors strike children, usually between the ages of 3 years and 8 years. They rarely occur in older children, adolescents and adults.
In both adults and children, night terrors may be caused by unresolved psychological conflicts, traumatic events or fatigue. In children, traumas such as the loss of a favorite toy, overhearing a loud argument between parents, watching scenes of violence on television or listening to frightening stories could trigger a night terror.
Particularly among adults, prescription drugs such as antihistamines, decongestants, levodopa, reserpine, beta blockers, and antidepressants, as well as withdrawal from addictive drugs, all can provoke sleep disturbance.