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Importance of Sleep Essay

Decent Essays

Importance of Sleep

It has been proposed, by some, that humans do not really need to sleep, and that we do so only out of habit. However, much research would suggest otherwise. It is true that some individuals (e.g. those suffering from insomnia) are able to live on very small amounts of sleep, but nevertheless, they do need some.

Studies of sleep deprivation have found that there may be severe consequences of not sleeping at. Randy Gardner, for example, went without sleep for 11 nights. By the end of this period, he suffered severe hallucinations and paranoia. He found interacting with other people difficult and even lost some of his sense of personal identity. There were, however, no long …show more content…

Stern and Morgane put forward an alternative restoration theory, proposing that during sleep, the levels of neurotransmitters in the brain are restored. Again, this theory would seem plausible, in part because people who take antidepressants (these drugs help restore neurotransmitter levels) appear to need less REM sleep than normal.

Evolutionary theories would perhaps seem less likely than restoration ones in terms of explaining the apparent need for sleep. According to hibernation theory (Webb, 1982), sleep has evolved to enable energy to be saved at times when being awake and active would be of little use to animals (e.g. because it is too dark for them to do anything). However, this does not seem to be applicable to humans - in order to meet the current demands of society (such as work and social activity), being awake all of the time would be of extreme value, especially as electric lights and so on mean that 24 hour activity would be possible. It is difficult to see, then, how sleep could be advantageous as Webb suggested. Neither can Meddis' (1975) theory be easily applied to humans. He suggested that sleep evolved so that animals can remain inactive and, consequently, hidden at times when they are more likely to be predated. As humans are the species highest in the food chain, it is unlikely that this best

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