Match each clinical presentation with the most likely sleep-wake disorder diagnosis.
- A 55-year-old obese man presents with loud snoring, witnessed gasping during sleep, and morning headaches.Obstructive Sleep Apnea
- A 22-year-old woman experiences overwhelming daytime sleepiness and sudden bilateral muscle weakness triggered by laughing.Narcolepsy Type 1
- A 45-year-old woman complains of a 'crawling' sensation in her legs occurring only when lying in bed, which improves with walking.Restless Legs Syndrome
- A 68-year-old man frequently punches and kicks his partner during sleep while 'fighting off attackers' in his vivid dreams.REM Sleep Behavior Disorder
Answer
Obstructive Sleep Apnea matches with the snoring and obese patient. Narcolepsy Type 1 matches with the sleepiness and cataplexy presentation. Restless Legs Syndrome matches with the leg crawling sensation. REM Sleep Behavior Disorder matches with the dream enactment.
Each presentation matches a distinct sleep disorder mechanism: anatomical airway obstruction causes Obstructive Sleep Apnea; hypocretin deficiency causes the cataplexy seen in Narcolepsy Type 1; dopaminergic dysfunction is thought to drive the sensory urges in Restless Legs Syndrome; and brainstem pathway degeneration leads to the loss of atonia in REM Sleep Behavior Disorder.
Step-by-Step Solution
Key Concept
Clinical presentation and diagnostic criteria of primary sleep-wake disorders.