To ensure he gets the most he can out of his cruise vacation, night after night Toby stays up late. He tries to sleep during the day, but his cabin is too noisy and he suffers from REM sleep deprivation. What can Toby expect to happen during his first several nights back home?

REM Rebound.

Explanation:

REM is a sleep deprivation that was first developed by Nathaniel Kleitman in 1953. REM stands for Rapid Eye Movement. In this form of sleep deprivation, the brain remains active in sleep while the muscles do not.

REM rebound is the phenomenon, in which the Stage R sleep increases above the baseline level. This happens because of long periods of sleep deprivation.

In the given case, Toby will experience REM Rebound because of his habit of getting up late in night and also sleep deprivation in the day time because of noise in his cabin.

So, the correct answer is REM Rebound.

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