By Dr. Liji Thomas, MD Reviewed by Lauren Hardaker Mar 12 2026 Consumer wearable sensors combined with AI modeling may enable continuous, real-world tracking of cognitive and emotional health, offering a scalable new approach to detecting subtle changes in brain health long before clinical symptoms emerge.  Study: Digital biomarkers for brain health: passive and continuous assessment from wearable sensors . Image credit: Andrey_Popov/Shutterstock.com A recent study in the journal npj Digital