Nightmare
Nightmare
Nightmare (/ˈnaɪtmɛər/; from the Old English night meaning "night" and mare meaning "demon") is a disturbing dream associated with negative feelings, such as anxiety or fear that awakens you. Nightmares are common in both children and adults. They may occur due to a variety of factors, including stress, anxiety, or sleep deprivation.
Etymology
The term "nightmare" is derived from the Old English night, meaning "night", and mare, a mythological demon or goblin who torments others with frightening dreams. Subsequently, the word "nightmare" was used to describe the demon that causes bad dreams. In modern usage, it has come to mean any frightening dream.
Related Terms
- Dream: A series of thoughts, images, and sensations occurring in a person's mind during sleep.
- Sleep: A naturally recurring state of mind and body, characterized by altered consciousness, relatively inhibited sensory activity, reduced muscle activity and inhibition of nearly all voluntary muscles.
- Sleep disorder: A medical disorder of the sleep patterns. It can be serious enough to interfere with normal physical, mental, social and emotional functioning.
- Sleep deprivation: The condition of not having enough sleep. It can be either chronic or acute and may vary widely in severity.
- Anxiety: A feeling of unease, such as worry or fear, that can be mild or severe. It's a normal and often healthy emotion. However, when a person regularly feels disproportionate levels of anxiety, it might become a medical disorder.
- Stress (biology): The body's method of reacting to a challenge or physical and psychological barrier. Numerous physical changes in the body are associated with stress responses.
See Also
External links
- Medical encyclopedia article on Nightmare
- Wikipedia's article - Nightmare
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