Night Terrors ;
People who have night terrors are often misdiagnosed. The most common one is a simple nightmare. Any of you who have had a night terror can say they aren’t even close! Another common misdiagnosis (especially among veterans) is PTSD or Post Traumatic Stress Disorder. For this reason I have included a description of the difference between nightmares and night terrors.
Night Terrors Symptoms:
Sudden awakening from sleep, persistent fear or terror that occurs at night, screaming, sweating, confusion, rapid heart rate, inability to explain what happened, usually no recall of "bad dreams" or nightmares, may have a vague sense of frightening images. Many people see spiders, snakes, animals or people in the room, are unable to fully awake, difficult to comfort, with no memory of the event on awakening the next day.
Night Terror or Nightmare?:
Nightmares occur during the dream phase of sleep known as REM sleep. Most people enter the REM stage of sleep sometime after 90 minutes of sleep. The circumstances of the nightmare will frighten the sleeper, who usually will wake up with a vivid memory of a long movie-like dream. Night terrors, on the other hand, occur during a phase of deep non-REM sleep usually within an hour after the subject goes to bed. This is also known as stage 4. (A link to a sleep stages chart can be found on the navigation bar to the left) During a night terror, which may last anywhere from five to twenty minutes, the person is still asleep, although the sleepers eyes may be open. When the subject does wake up, they usually have no recollection of the episode other than a sense of fear. This, however, is not always the case. Quite a few people interviewed can remember portions of the night terror, and some remember the whole thing.
http://www.nightterrors.org/
Post Traumatic Stress Disorder
What causes it?
PTSD is caused by a psychologically traumatic event involving actual or threatened death or serious injury to oneself or others. Such triggering events are called ‘stressors’; they may be experienced alone or while in a large group.
Violent personal assault, such as rape or mugging, car or plane accidents, military combat, industrial accidents and natural disasters, such as earthquakes and hurricanes, are stressors which have caused people to suffer from PTSD. In some cases, seeing another person harmed or killed, or learning that a close friend or family member is in serious danger has caused the disorder.
What are the signs?
The symptoms of PTSD usually begin within 3 months of the traumatic event. However, sometimes they surface many years later. The duration of PTSD, and the strength of the symptoms, vary. For some people, recovery may be achieved in 6 months; for others, it may take much longer.
There are three categories of symptoms. The first involves re-experiencing the event. This is the main characteristic of PTSD and it can happen in different ways. Most commonly the person has powerful, recurrent memories of the event, or recur-rent nightmares or flashbacks in which they re-live their distressing experience. The anniversary of the triggering event, or situations which remind them of it, can also cause extreme discomfort. Avoidance and emotional numbing are the second category of symptoms. The first occurs when people with PTSD avoid encountering scenarios which may remind them of the trauma. Emotional numbing generally begins very soon after the event. A person with PTSD may withdraw from friends and family, they may lose interest in activities they previously enjoyed and have difficulty feeling emotions, especially those associated with intimacy. Feelings of extreme guilt are also common.
In rare cases, a person may enter dissociative states, lasting anywhere from a few minutes to several days, during which they believe they are re-living the episode, and behave as if it is happening all over again. The third category of symptoms involves changes in sleeping patterns and increased alertness. Insomnia is common and some people with PTSD have difficulty concentrating and finishing tasks. Increased aggression can also result
http://www.cmha.ca/BINS/content_page.asp?cid=3-94-97