Photoplethysmography (PPG) is an optical sensing technique that measures blood volume changes and underpins devices ranging ...

Dementia is a group of disorders that gradually impair memory, thinking and daily functioning. Alzheimer's disease (AD), the ...

Analysis of more than 1 million people shows that mental-health disorders fall into five clusters, each of them linked to a ...

Eyes with meibomian gland dysfunction are more likely to have increased tears and lower tear film stability, possible signs ...

Much has changed in how we understand and treat eating disorders. Some significant aspects have remained consistent or ...