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, Skip to content Menu Our Bloggers Twitter Google News Substack FaceBook Contribute Contact Search Old dogs with dementia sleep less deeply , just like people with Alzheimerâ s April 28, 2023 Frontiers In Credit Pixabay In people with Alzheimerâ s , the earliest symptoms are commonly disruptions in sleep . rhythms These include daytime sleepiness , showing agitation or confusion around dusk , staying awake longer , and waking up often at night . These changes are thought to result from damage to sleep-regulating areas in the brain . Alzheimer patients tend to spend less time in both REM rapid eye movement sleep , in which most dreaming occurs , and non-REM NREM sleep . But they show the greatest reduction in so-called slow-wave sleep SWS â a stage of non-dreaming deep sleep ,