Do you need to sleep?. Why we sleepWhy we sleep. Watch this for explanation of stages. https://www.youtube.com/watch?v=fNlp0UM qUtM https://www.youtube.com/watch?v=fNlp0UM.

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Presentation transcript:

Do you need to sleep?

Why we sleepWhy we sleep. Watch this for explanation of stages. qUtM qUtM

Repair and Restoration NREM (Non-rapid eye movement) sleep is important for restoring physiological functions, while REM sleep is essential in restoring mental functions. Support for this theory is provided by research that shows periods of REM sleep increase following periods of sleep deprivation and strenuous physical activity. During sleep, the body also increases its rate of cell division and protein synthesis, further suggesting that repair and restoration occurs during sleeping periods.

Evolutionary Theory of Sleep Evolutionary theory, also known as the adaptive theory of sleep, suggests that periods of activity and inactivity evolved as a means of conserving energy. According to this theory, all species have adapted to sleep during periods of time when wakefulness would be the most hazardous. Support for this theory comes from comparative research of different animal species. Animals that have few natural predators, such as bears and lions, often sleep between 12 to 15 hours each day. On the other hand, animals that have many natural predators have only short periods of sleep, usually getting no more than 4 or 5 hours of sleep each day.

Information Consolidation The information consolidation theory of sleep is based on cognitive research and suggests that people sleep in order to process information that has been acquired during the day. In addition to processing information from the day prior, this theory also argues that sleep allows the brain to prepare for the day to come. Some research also suggests that sleep helps cement the things we have learned during the day into long- term memory. Support for this idea stems from a number of sleep deprivation studies demonstrating that a lack of sleep has a serious impact on the ability to recall and remember information.

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Can you sleep too much. The sleep bank? Some people 4 others 10 everyone is different. Falling asleep during the day = not enough sleep. Not being able to sleep – Insomnia!Insomnia I don’t need sleep! I don’t need sleep