Evaluate the characteristics of sleep and consider what evidence there is for an understanding of why we sleep.
Up until the 1950's the majority of researchers believed that 'sleep' was a resting state that was the exact opposite of being awake. It was not until 1953 that work by Kleitman and Aserinsky produced evidence that this was indeed not the case. Berger (1920) was the first researcher to use an electroencephalogram (EEG) to examine electrical brain activity during sleep.…
