Which term best describes a sleep cycle including REM and NREM?

Which term best describes a sleep cycle including REM and NREM?

• A. Normal Sleep Cycle
• B. Fragmented Sleep
• C. NREM Stage III IV
• D. Delayed Onset of Sleep

Answer: (A)

A normal sleep cycle describes the repeating pattern of alternating non-REM and REM sleep that occurs throughout the night. In a typical cycle, you progress from lighter non-REM stages into deeper non-REM sleep, then enter REM sleep before the cycle starts again about every 90 minutes. This combination of REM and non-REM within each cycle is what defines a normal sleep cycle. Fragmented sleep refers to frequent awakenings or interruptions, which disrupt the continuity of cycles. NREM Stage III/IV denotes the deep sleep portion within a cycle, not the entire cycle itself. Delayed onset of sleep means difficulty falling asleep at the start of the night, not the structure of the sleep cycles once sleep is underway.

A normal sleep cycle describes the repeating pattern of alternating non-REM and REM sleep that occurs throughout the night. In a typical cycle, you progress from lighter non-REM stages into deeper non-REM sleep, then enter REM sleep before the cycle starts again about every 90 minutes. This combination of REM and non-REM within each cycle is what defines a normal sleep cycle.

Fragmented sleep refers to frequent awakenings or interruptions, which disrupt the continuity of cycles. NREM Stage III/IV denotes the deep sleep portion within a cycle, not the entire cycle itself. Delayed onset of sleep means difficulty falling asleep at the start of the night, not the structure of the sleep cycles once sleep is underway.