Final answer:
REM rebound is the phenomenon in which individuals spend more time in REM sleep after a period of deprivation to recoup lost sleep. It is regulated by the body's homeostatic mechanisms and is believed to play a role in learning, memory, and emotional processing.
Step-by-step explanation:
The phenomenon where individuals who are deprived of REM sleep and then allowed to sleep without disturbance spend more time in REM sleep to recoup the lost time is known as REM rebound.
REM rebound suggests that REM sleep is homeostatically regulated and that it plays a role in processes related to learning, memory, and emotional processing. Sleep deprivation in general is associated with negative consequences, so it is important to prioritize adequate and uninterrupted sleep.