Sleep is a state of natural rest observed throughout the kingdom. It is a necessary and a vital biological function.
Why is sleep important?
Sleep is essential to maintain a person’s physical and emotional well being. Studies have shown that without enough sleep, a person’s ability to perform even simple tasks declines dramatically.
Persistent sleep deprivation can cause serious health conditions such as erratic behavior, mental disturbance, physical inability, and in the most extreme, yet rare cases, death.
Researchers from the University of Warwick and University College London have found that lack of sleep can more than double the risk of death from cardiovascular disease. And too much sleep can also double the risk of death, weight gain, hypertension and Type 2 diabetes. So itâ€™s highly important to maintain the normal and required sleep hours and patterns to live a healthy life.
Studies say that eight to nine hours of sleep for adult humans is optimal and sufficient for the benefit of overall health.
A widely publicized 2003 study  performed at the University Of Pennsylvania School Of Medicine demonstrated that cognitive performance declines with fewer than eight hours of sleep.
Why do we need sleep?
- Sleep enables the body and mind to rejuvenate, reenergize, and restore.
- The brain performs vital housekeeping tasks, such as organizing long-term memory, integrating new information, and repairing and renewing tissue, nerve cells and other biochemical during sleep.
- Sleep allows the body to rest and the mind to sort out past, present, and future activities and feelings.
- Sleep helps our nervous systems to work properly.
- Sleep maintains normal levels of cognitive skills such as speech, memory, innovative and flexible thinking.
- Sleep plays a significant role in brain development.
What affects normal sleep patterns?
A disturbance in the normal sleep pattern is called as sleep disorder. It causes due to many reasons like mental disturbance, physical problems, medications, aging etc.
What is sleep disorder?
A disturbance in the normal sleep pattern is called as sleep disorder. It causes due to many reasons like mental disturbance, physical problems, medications, aging etc. Insomnia, sleep apnea, hypersomnia, narcolepsy, parasomnias, inadequate sleep hygiene are some common types of sleep disorders.
Disturbances in the normal pattern of sleep affect badly both mentally and physically. Sometimes it results in serious consequences. Lack of sleep is said to have been be a contributory factor to a number of international disasters such as Exxon Valdez, Chernobyl, Three Mile Island and the Challenger shuttle explosion.