What can affect a person's normal sleep-wake routine?
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Changes in work schedules, irregular sleeping habits, and certain medical conditions can all influence the body's natural sleep-wake rhythm. Conditions such as narcolepsy, sleep apnea, and shift work sleep disorder may affect nighttime rest or daytime alertness in different ways.
I recently came across sleep-wake health information on Modaineurope and found it useful for understanding how these conditions differ. Are there any other reliable resources that explain sleep patterns and wakefulness in simple terms?