Scientists probe Brain's 'Alertness' chemical in older insomniacs to fight dementia

This study looks at how a brain chemical called norepinephrine affects sleep and thinking in older adults with insomnia, who are at higher risk for Alzheimer's. Researchers will measure this chemical in the blood and use a light therapy to try to improve sleep and mental sharpness. The goal is to understand the link between poor sleep, brain chemistry, and memory decline.