Maintaining a consistent sleep-wake routine helps insomnia by which mechanism?

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Multiple Choice

Maintaining a consistent sleep-wake routine helps insomnia by which mechanism?

Explanation:
Regular sleep-wake timing provides consistent timing cues from light exposure and daily activities, allowing the body's circadian clock to stay synchronized with the 24-hour day. This stabilizes circadian cues, so the brain's signals for sleep and wakefulness become more predictable, which helps improve sleep onset and maintain sleep in insomnia. It isn’t that the schedule has no effect on circadian cues, nor that it destabilizes rhythms—stability of daily timing reinforces a stable internal clock. While reducing daytime naps can help some people, the primary mechanism here is the stabilization of circadian cues, not nap frequency.

Regular sleep-wake timing provides consistent timing cues from light exposure and daily activities, allowing the body's circadian clock to stay synchronized with the 24-hour day. This stabilizes circadian cues, so the brain's signals for sleep and wakefulness become more predictable, which helps improve sleep onset and maintain sleep in insomnia. It isn’t that the schedule has no effect on circadian cues, nor that it destabilizes rhythms—stability of daily timing reinforces a stable internal clock. While reducing daytime naps can help some people, the primary mechanism here is the stabilization of circadian cues, not nap frequency.

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