A population-based study suggests elderly people who show signs of excessive daytime sleepiness may be more vulnerable to amyloid-beta accumulation, reports Neurology Today.

“Excessive daytime sleepiness is both a marker of potential important diseases at an individual level, and it’s a symptom that interferes with quality of life,” David S. Knopman, MD, FAAN, a study co-author and professor of neurology and the associate director of the Mayo Clinic Alzheimer’s Disease Research Center in Rochester, MN, told Neurology Today.