Researchers report cognitively normal older people who experience excessive sleepiness during the day have more brain atrophy than those who do not experience fatigue.
A new study reports daytime sleepiness may increase the risk of developing Alzheimer's disease. Researchers report those who are sleepy during the day are three times more likely to have amyloid beta deposits in their brains.
Insufficient sleep or fluctuations in sleep patterns are associated with negative moods in teens, and bad moods tend to predict unusually bad sleep the next night.
Researchers report teenage girls are more heavily impacted by sleepiness than boys of the same age. The study reveals teen girls have more trouble saying awake during school hours and often feel too tired to embark on other social activities.
Higher levels of sleepiness were associated with a reduction in both social activities and the amount of time people engage in social events. Social activities in the afternoons were linked to increased sleepiness following the engagement and longer sleep duration at night. Higher levels of social interaction at night were linked to reduced immediate sleepiness and shorter overall sleep duration.