Sleep Disorders in the DSM-5-TR | Symptoms and Diagnosis

1 Jun 2022 · 54 min
53:59

A recorded lecture by Dr. Dawn-Elise Snipes reviewing DSM-5-TR sleep-wake disorders (major focus: insomnia, hypersomnolence, obstructive sleep apnea, circadian rhythm disorders, restless legs). The talk covers prevalence estimates, core diagnostic thresholds (e.g., "three nights per week for at least three months" for insomnia/hypersomnolence), sleep-stage physiology (REM ~20–25%, NREM stage 2 ~50%, stage 3 ~20%), clinical risks (mood/cognitive effects, suicidality, cardiovascular disease), and practical assessment/referral and behavioral treatment targets for clinicians (sleep hygiene, CBT techniques, medical referral for sleep studies).

Questions this video answers

At least three nights per week for at least three months.

Difficulty initiating sleep defined as sleep latency greater than 20–30 minutes.

REM ~20–25%; NREM stage 2 ~50%; NREM stage 3 (deep sleep) ~20%.

OSA: ≥5 apneas/hypopneas per hour plus nocturnal breathing symptoms or daytime sleepiness, or ≥15 apneas/hypopneas per hour on polysomnography regardless of symptoms.

Insomnia: 4–22% (rising to ~40–50% with comorbid mental illness); Hypersomnolence: 5–33%; Circadian rhythm disorders: ~3%; OSA: males 15–30%, females 10–15%; Restless leg syndrome: 4–14%.

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