Poor sleep among older adults is linked to disruptions in the brain's "waste removal system," according to researchers. A recent study offers valuable insight into how sleep quality impacts brain functioning. Many studies have linked poor sleep with a decline in brain functioning. Professor Lee's team focused on the glial-lymphatic (glymphatic) system, a fluid transport pathway that plays a vital role in clearing waste from the brain. The system's efficiency is a critical determinant of brain health, particularly in aging populations. Professor Lee and her team sought to understand the glymphatic-brain relationship in poor sleepers, which underlies memory decline. Dysfunction...