NPR sleep study shows a link between sleep and brain function where older adults’ forgetfulness is tied to faulty brain rhythms in sleep.
During deep sleep, two brain waves that are responsible for saving new memories become increasingly out of sync as we age, NPR reports.
The finding sprang from a study that compared how well young and old people retained word pairs. Participants were monitored as they slept. A group of people in their 60s and 70s had less synchronized brain waves than those in their 20s. The older group also remembered fewer word pairs the next day.