الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
Sleeping is one of the most important physiological processes of our body. Approximately 20-40% of one day is sleep time, and during this period sleep exerts multiple functions in our body. For example, it relieves mental fatigue, improves memory, regulates metabolism, and plays key roles in tissue regeneration, synaptic stability, and immune regulation.
Numerous detrimental influences of sleep disorders have been described: decreased physical capacities (fatigue, dizziness, injuries, and mortality), psychiatric symptoms (anxiety, depression, and mania) and impaired cognitive abilities (low memory recall and learning abilities and dementia).
Sleep disorders are mainly classified as insomnia, hypersomnia, sleep-related breathing disorders, circadian rhythm sleep-wake disorders, sleep-related movement disorders, parasomnias, and other sleep disorders. Each diagnosis possesses specific coding information. During recent years, evidence of sleep disorders in neurological diseases is growing rapidly.
Stroke is defined as a sudden loss of focal cerebral function. This process lasts for 24 hr. or more and is thought to be caused by an inadequate blood supply to some parts of the brain (ischemic stroke), or spontaneous hemorrhage of brain substance (primary intracerebral hemorrhage), where brain imaging was normal or showed evidence of recent ischemia or hemorrhage.