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This lesson dives into the science of sleep disorders, covering why 30–50% of people struggle with sleep at some point in their lives. From the self-perpetuating anxiety loop of insomnia to the neurological misfires behind narcolepsy, the video unpacks exactly how and why our brains can fail us in the dark. Drawing from Section 4.4 of Psychology 2e, the discussion uses real case studies and clinical research to make the mechanics of disordered sleep concrete and memorable. In this video: • Insomnia's clinical threshold — 3+ nights a week for at least a month — and the self-perpetuating cycle of sleeplessness, anxiety, and heightened arousal that keeps sufferers awake • How cognitive behavioral therapy (CBT) rewires the brain's association between the bed and stress, including the counterintuitive rule to get out of bed when you can't sleep • Parasomnias explained: sleepwalking during slow-wave sleep, including the disturbing 1997 Scott Falater murder case and what it reveals about unconscious goal-directed behavior • REM sleep behavior disorder (RBD) — when the brain's paralysis signal fails during dreaming — and its striking link to early-onset Parkinson's disease • Obstructive vs. central sleep apnea: the mechanical airway-blockage model versus the neurological breathing-signal failure, and the compliance challenges of CPAP treatment • SIDS risk factors including hyperthermia and why indoor caps on sleeping infants can fatally suppress an infant's arousal response, plus the Safe to Sleep prevention protocols • Narcolepsy and cataplexy: how a deficit of the signaling molecule hypocretin collapses the boundary between waking and REM sleep, illustrated by a case study of a 50-year-old woman with right-sided cataplexy #OpenStax #Psychology #SleepDisorders #Narcolepsy #Insomnia OpenStax Content adapted from "OpenStax Psychology 2e", by OpenStax licensed under CC BY 4.0. Content based on Web Version: Apr 23, 2026. Read the textbook online https://openstax.org/details/books/psychology-2e Music first girl talking to me. by ikkun (ex. Barradeen) | https://soundcloud.com/ikkunwastaken Royalty Free Music by https://www.free-stock-music.com Creative Commons / Attribution-ShareAlike 3.0 Unported (CC BY-SA 3.0) https://creativecommons.org/licenses/by-sa/3.0/deed.en_US
Answer each question based only on what was covered in the video lesson. No outside knowledge is required — all answers can be found in the content you just watched.
Answer each question using what you learned in the video lesson. Questions progress from basic recall to deeper conceptual application — read each stem carefully before responding.
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