Tuesday, January 27, 2026
A study funded by the National Institutes of Health (NIH) provides the clearest evidence to date to link severe chronic traumatic encephalopathy (CTE) to dementia risk. CTE is a degenerative brain disorder in some people who have had repeated head impacts over time. It can only be diagnosed after death by examining brain tissue. While researchers were able to link severe CTE (stages III and IV) to dementia risk, they did not find any measurable link between less severe CTE (stages I and II) and changes in thinking, mood, or daily functioning.
The research, led by scientists at Boston University CTE Center and the U.S. Department of Veterans Affairs Boston Healthcare System, analyzed 614 donated brains from people with known exposure…