Which disorder is characterized by self-reported excessive sleepiness with the main sleep period lasting seven hours, occurring at least three times per week for three months?

• A. Parasomnias
• B. Hypersomnolence
• C. Circadian Rhythm Sleep-Wake Disorders
• D. Normative Variation in Sleep

Answer: (B)

The key idea is persistent daytime sleepiness despite what appears to be adequate nighttime sleep. When someone reports feeling excessively sleepy during the day even though their main sleep period lasts about seven hours, it signals hypersomnolence rather than a problem with falling asleep. The DSM-5 criteria specify that this excessive sleepiness occurs at least three times per week for a minimum of three months, causing distress or impairment. That combination of daytime sleepiness with a reasonably long nocturnal sleep window and the sustained duration over months points to hypersomnolence disorder.

Parasomnias involve unusual behaviors or events during sleep (like sleepwalking or nightmare disorder) rather than ongoing daytime sleepiness. Circadian rhythm sleep-wake disorders relate to misalignment between an individual’s sleep-wake schedule and the environment, leading to sleepiness at inappropriate times, but the scenario emphasizes excessive sleepiness despite roughly adequate sleep duration, not a shifted or irregular schedule. Normative variation would not produce impairment or the duration criteria described.

So, the pattern described fits hypersomnolence disorder: excessive sleepiness despite a seven-hour main sleep period, occurring at least three times weekly for three months.