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Dear Editor,rnSleep is essential for survival in mammals, and there are many examples of how the brain fails to function properly without sleep.These include the importance of sleep for plasticity during development [1], memory formation and consolidation [2], and the erasure of undesired memories [3] as well as the improvement of memory [4], perceptual skills [5], and learning abilities after sleep [6].These studies suggest that sleep not only benefits individual memories formed before sleep but also enhances individual performance on sensory discrimination tasks and learning ability after sleep.However, whether and how sleep contributes to sensory signal processing remains largely unknown.