Which statement is consistent with Hypersomnolence Disorder criteria?

• A. Excessive sleepiness after only one night of poor sleep.
• B. 3 TIMES A WEEK.
• C. AT LEAST 3 MONTHS with the full criteria including 1 of: nonrestorative sleep after 9 hours, daytime sleepiness, or difficulty awakening; and not due to another sleep disorder.
• D. Not due to sleep apnea or other parasomnias.

Answer: (C)

Persistent excessive sleepiness that causes distress or impairment, occurring for a sustained period, is the hallmark of Hypersomnolence Disorder. The criteria require this pattern to be present for at least three months and to occur with a regular frequency (several times per week), plus one clear symptom such as nonrestorative sleep after a long main sleep period (often around nine hours or more), daytime sleepiness, or difficulty waking. Importantly, the symptoms must not be better explained by another sleep disorder, a medical condition, or substance use. This combination of persistent duration, specific symptomatic criteria, and proper exclusion is what makes the statement describing at least three months with the full criteria (including at least one required symptom) and not due to another sleep disorder the best fit. The other options describe transient, insufficiently lasting patterns or omit the necessary duration and exclusion elements, so they don’t meet the diagnostic standard.