A nightmare, also called a bad dream, is an unpleasant dream that can cause a strong emotional response from the mind, typically fear but also despair, anxiety and great sadness. However, psychological nomenclature differentiates between nightmares and bad dreams, specifically, people remain asleep during bad dreams whereas nightmares awaken individuals. Further, the process of psychological homeostasis employs bad dreams to protect an individual's Homeostatically Protected Mood (HPMood) from the impact of elevated anxiety levels. During sleep, nightmares indicate the failure of the homeostatic system employing bad dreams to extinguish anxiety accumulated throughout the day. The dream may contain situations of discomfort, psychological or physical terror or panic. After a nightmare, a person will often awaken in a state of distress and may be unable to return to sleep for a short period of time.
|The Sleep of Reason Produces Monsters (Francisco de Goya, c.1797)|
|Causes||Stress or Anxiety|
Nightmares can have physical causes such as sleeping in an uncomfortable position or having a fever, or psychological causes such as stress or anxiety. Eating before going to sleep, which triggers an increase in the body's metabolism and brain activity, is a potential stimulus for nightmares.
Signs and symptomsEdit
Those with nightmares experience abnormal sleep architecture and that the results of having a nightmare during the night were very similar to those of people who have insomnia. This is thought to be caused by frequent nocturnal awakenings and fear of falling asleep.
Scientific research shows that nightmares may have many causes. In a study focusing on children, researchers were able to conclude that nightmares directly correlate with the stress in children’s lives. Children who experienced the death of a family member or a close friend or know someone with a chronic illness have more frequent nightmares than those who are only faced with stress from school or stress from social aspects of daily life. A study researching the causes of nightmares focuses on patients who have sleep apnea. The study was conducted to determine whether or not nightmares may be caused by sleep apnea, or being unable to breathe. In the nineteenth century, authors believed that nightmares were caused by not having enough oxygen, therefore it was believed that those with sleep apnea had more frequent nightmares than those without. The results actually showed that healthy people have more nightmares than the sleep apnea patients. Another study supports the hypothesis. In this study, 48 patients (aged 20–85 yrs) with obstructive airways disease (OAD), including 21 with and 27 without asthma, were compared with 149 sex- and age-matched controls without respiratory disease. OAD Ss with asthma reported approximately 3 times as many nightmares as controls or OAD Ss without asthma. The evolutionary purpose of nightmares then could be a mechanism to awaken a person who is in danger.
In Stephen LaBerge's book entitled Exploring the World of Lucid Dreaming (1990) he outlines a possible reason for how dreams are formulated and why nightmares occur with a high frequency. A dream starts with an individual thought or scene, in his example he uses the scene of walking down a dimly lit street. Since dreams are not predetermined, your brain responds to the situation by either thinking a good thought or a bad thought, and the dream framework follows from there. Since the prominence of bad thoughts in dreams is higher than good, the dream will proceed to be a nightmare.
Sigmund Freud and Carl Jung seemed to have shared a belief that people frequently distressed by nightmares could be re-experiencing some stressful event from the past. Both perspectives on dreams suggest that therapy can provide relief from the dilemma of the nightmare experience.
Halliday (1987), grouped treatment techniques into four classes. Direct nightmare interventions that combine compatible techniques from one or more of these classes may enhance overall treatment effectiveness:
- Analytic and cathartic techniques
- Story-line alteration procedures
- Face-and-conquer approaches
- Desensitization and related behavioral techniques.
Post-traumatic stress disorderEdit
Reccurring post-traumatic stress disorder nightmares in which traumas are re-experienced respond well to a technique called imagery rehearsal. This involves dreamers coming up with alternative, mastery outcomes to the nightmares, mentally rehearsing those outcomes awake, and then reminding themselves at bedtime that they wish these alternate outcomes should the nightmares reoccur. Research has found that this technique not only reduces the occurrence of nightmares and insomnia, but also improves other daytime PTSD symptoms. The most common variations of Imagery Rehearsal Therapy (IRT) "relate to the number of sessions, duration of treatment, and the degree to which exposure therapy is included in the protocol". The medication prazosin appears useful in decreasing the number of nightmares and the distress caused by them in people with PTSD.
Fearfulness in waking life is correlated with nightmares. Studies of dreams have estimated that about 75% of the time, the emotions evoked by dreams are negative. However, it is worth noting that people are more likely to remember unpleasant dreams.
One definition of "nightmare" is a dream which causes one to wake up in the middle of the sleep cycle and experience a negative emotion, such as fear. This type of event occurs on average once per month. They are not common in children under five, but they are more common in young children (25% experiencing a nightmare at least once per week), most common in teenagers, and common in adults (dropping in frequency about one third from age 25 to 55).
The word "nightmare" is derived from the Old English "mare", a mythological demon or goblin who torments others with frightening dreams. Subsequently, the prefix "night-" was added to stress the dream aspect. The word "nightmare" is cognate with the older Dutch term nachtmerrie and German Nachtmahr (dated).
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