Insomnia

:For the novel by Stephen King, see Insomnia (novel); for the Norwegian movie and its American remake, see Insomnia (movie).

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Insomnia is a sleep disorder characterized by an inability to sleep and/or to remain asleep for a reasonable period during the night. Sufferers typically complain of being unable to close their eyes or 'rest their mind' for more than a few minutes at a time. Insomnia is often caused by fear, stress and anxiety.

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The most common forms of insomnia are:

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Sleep Apnea - This is when a sleeping person's breathing is interrupted, thus interrupting the normal sleep cycle. With the obstructive form of the condition, some part of the sleeper's respiratory tract loses muscle tone and partially collapses. People with obstructive sleep apnea often do not remember any of this, but they complain of excessive sleepiness during the day. Central sleep apnea is where the normal central nervous system stimulus to breathe is interrupted, and the individual must actually wake up to resume breathing. This form of apnea is often related to a cerebral vascular condition, congestive heart failure, and premature aging.

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Restless Leg Syndrome (RLS) and Periodic Limb Movement (PLM) - The symptoms of RLS and PLM are often described as a tingling and creeping sensation in the legs which creates a powerful urge to move them. The individual continually moves in bed in an attempt to relieve these unpleasant sensations, resulting in restlessness and consequently lack of sleep. Fortunately for sufferers of the condition, current treatments for this disorder are effective in over 90% of those treated.

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Jet Lag - this is seen in people who travel through multiple time zones on a regular basis, as the time relative to the rising and falling of the sun no longer coincides with the body's internal concept of it, and is also seen in people who consistently work night shifts. See also: circadian rhythm.

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Parasomnia - this includes a number of disorders of arousal or disruptive sleep events including nightmares, sleepwalking, violent behavior while sleeping, and REM behaviour disorder, in which a person moves their physical body in response to events within their dreams. These conditions can often be treated successfully through medical intervention or through the use of a sleep specialist.

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Many people who feel they are suffering from insomnia may actually have a lower physical need for sleep than they believe they do. A normal part of the aging process is to sleep lighter and for shorter periods of time, and some elderly people toss and turn in bed late at night or early in the morning when their body has no physical need for more rest, because they believe that they 'need' a certain amount of sleep to be rested.

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Insomnia is a common side-effect of some medications, and it can also be caused by stress, emotional upheaval, physical or mental illness, dietary allergy and poor sleep hygiene. Insomnia is a major symptom of mania in people with bipolar disorder, and it can also be a sign of hyper-thyroidism, depression, or other ailments with stimulating effects.

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Additionally, a rare genetic condition can cause a prion-based, permanent and eventually fatal form of insomnia called Fatal Familial Insomnia.

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Stephen King: Stephen Edwin King (born September 21, 1947) is an American author best known for horror novels. King's extremely popular books are among the best-selling books ever....

Insomnia (novel): Insomnia is a novel written by Stephen King and first published in 1994. Like It, its setting is the fictional town of Derry, Maine....

Insomnia (movie): REDIRECT Insomnia (disambiguation)...

Insomnia related Images and Photos (experimental)

Insomnia	Insomnia (DVD)	Insomnia (BD) (Inception Movie Cash)	Insomnia Café Hardcover Graphic Novel
Devil's Advocate, The/Insomnia (DVD) (DBFE)