The parsasomias category involves disorders where someone undergoes abnormal or abnormal movement, behavior, emotion, perception and dreams that occur when somebody is falling asleep between phases of sleep, or even during waking from sleep. A Person has difficulty staying asleep or falling asleep. There are three kinds of insomnia. Transient Chronic insomnia when a individual is not able to sleep for a period of longer than three weeks insomnia when a individual cannot always sleep for a period of one to three weeks; and insomnia that lasts less than 1 week. An Individual experiences episodes of sleepiness that is excessive or sleep through the night. The feeling of sleepiness does not facilitate, although these folks feel the need to nap times a day.  This is a chronic sleep disorder and a chronic disease that results from the inability of the mind to regulate cycles of an individual.

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An individual afflicted with narcolepsy experiences uncontrollable bouts and sleepiness of falling asleep during the day. Individuals with narcolepsy can also experience cataplexy that is a sudden loss of muscle tone which can result in physical changes like slurred speech or muscle weakness; suffer with hypnologic hallucinations a dream like auditory or visual hallucination experienced while dozing or falling asleep; or sleep paralysis in which the individual temporarily is not able to talk or move while falling asleep or waking. This disorder occurs when there is a change in individual patterns like jet lag or shift work schedule change.

This is a neurological disorder where an individual experiences an unpleasant feeling in their leg for instance, a creeping or tugging feeling. These sensations occur as when sleeping when a man is in a horizontal or sitting position. Based on seriousness these sensations can be irritating or they may be painful. This is really a disorder experiences a sleep study test and though not diagnosed unless it is brought by the person to the attention of a doctor. It happens when an individual has one or more pauses in breathing while sleeping. The breathing pauses for minutes or seconds depending on the intensity of the sleep apnea of an individual. When breathing starts a loud snort or a sound often accompanies it. This is a continuing problem and the person with sleep apnea does not get decent quality sleep, which causes sleepiness. View here