Anne has noticed that for the past three weeks she is unable to sleep for more than five hours at a time, even though she used to regularly get eight hours of sleep per night. She wakes early in the morning and just can't fall back to sleep once this happens. It appears that Anne has developed

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Anne's symptoms point to insomnia, which is difficulty falling or staying asleep. The fact that she used to get eight hours of sleep per night but is now only able to sleep for five hours suggests that this is a recent development rather than a long-standing issue like pseudoinsomnia. Somnambulism and sleep apnea involve different symptoms, such as sleepwalking and interrupted breathing during sleep, respectively.

Anne Has Noticed That for the Past Three Weeks She