Sleep: Spring cleaning for the brain?

If you've ever been sleep-deprived, you know the feeling that your brain is full of wool. Now, a study published in the 3 April edition of the journal Science has molecular and structural evidence of that woolly feeling - proteins that build up in the brains of sleep-deprived fruit flies and drop to lower levels in the brains of the well-rested. The proteins are located in the synapses, those specialised parts of neurones that allow brain cells to communicate with other neurones...

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