Quiet sleep is for repair, active sleep is for learning

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Sleep is thought to achieve many different functions, from brain waste clearance to regulating emotions and perception. Understanding sleep functions in animal models has been difficult because sleep has been typically reduced to a single state. Our discovery of distinct sleep stages in the fruit fly provides a powerful way to study how different conserved sleep functions are regulated. This project will use new strategies for manipulating sleep stages in flies to understand their respective physiology and functions. We will test our hypothesis that different categories of sleep functions have been segregated by evolution into different stages: a quiet stage concerned primarily with brain repair and an active stage important for learning.