The powerpoint containing the summary of sleep (ie general things we can say about sleep) is here.
We've now started to investigate some of the theories that attempt to explain why we sleep. We looked at two evolutionary theories - the energy conservation theory and the predator avoidance theory. Neither theory is satisfactory on their own, but probably go someway towards explaining the benefits of sleep - if not actually why we sleep. The ppt containing the work on evolutionary theories is here.
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