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Sleep is a brain state so really nothing goes to sleep in your body except for your brain.

However your body is in a state of atonia while you are sleeping (during REM sleep). Atonia means that the motor signals from your brain are cut off from your body essentially paralyzing your body so you can't move around while you are sleeping. This is controlled by the pons [1] and the mesopontine tegmentum [2] in your brain.

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9y ago

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