We have to sleep because sleep plays a significant role in brain development. Lack of sleep has serious effects on one's brain ability to function. The after effects include grumpiness, grogginess, irritability and forgetfulness. One's concentration becomes more difficult and his/her attention span would shortens considerably. Sleep deprivation not only has a major impact on cognitive functioning but also on emotional and physical health.The much negative effects of insufficient sleep shows how important sleep is to our human body. Sleep occurs in a recurring cycle of 90 to 110 minutes and is divided into two categories: non-REM (which is further split into four stages) and REM sleep. I find this very interesting as it not only showed me the importance of sleeping, it also gave me a clearer view on sleeping. Sleeping is a thing we all do everyday but yet not many knew about what really is taking place when they're sleeping. The amount of sleep one needs varies and the world record for the longest period without sleep is 11days. I find it amazing for people to be able to stay up without sleep for days, with the deeper knowledge of side effects one would have after reading this article, i doubt one would want that to happen on themselves, so have sufficient sleep everyday!

Charmaine (19)

Source: http://www.bbc.co.uk/science/humanbody/sleep/articles/whatissleep.shtml

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