The proportion of REM sleep is greatest in the first sleep cycle and dissipates over the course of the sleep period. This statement is:

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Multiple Choice

The proportion of REM sleep is greatest in the first sleep cycle and dissipates over the course of the sleep period. This statement is:

REM sleep follows the night in a way that the amount and length of REM periods grow as the night progresses. The first REM period is relatively brief, occurring after about 70–90 minutes of sleep, and typically lasting only around 5–15 minutes. As the night continues, subsequent REM periods become longer, often 20–60 minutes, and REM periods are more prominent in the second half of the night. Because of this pattern, REM is not greatest in the first sleep cycle—it actually increases across cycles. The statement is therefore not accurate.

REM sleep follows the night in a way that the amount and length of REM periods grow as the night progresses. The first REM period is relatively brief, occurring after about 70–90 minutes of sleep, and typically lasting only around 5–15 minutes. As the night continues, subsequent REM periods become longer, often 20–60 minutes, and REM periods are more prominent in the second half of the night. Because of this pattern, REM is not greatest in the first sleep cycle—it actually increases across cycles. The statement is therefore not accurate.

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