Scientists Link Heavy TV Watching to Brain Changes Decades Later

In the ARIC Study, adults who reported watching TV very often in midlife had smaller memory- and attention-related brain regions and more white matter hyperintensities on MRI more than 20 years later.

The link held even after adjusting for major health and lifestyle factors.

The pattern differed from occupational sitting, suggesting not all sedentary behavior affects the brain in the same way.

The findings suggest frequent passive TV time in middle age may be a marker for later cognitive decline and dementia-related brain changes.