Study shows NFL players with CTE have cognitive decline missed by current tests

Boston University researchers have completed the largest study to date that characterizes the cognitive symptoms of former National Football League players with confirmed chronic traumatic encephalopathy (CTE). The study focused on athletes who underwent neuropsychological testing while still alive, providing a unique window into the disease’s clinical presentation before post‑mortem confirmation. By compiling and analyzing these data, the team has begun to map the specific cognitive deficits associated with CTE.

CTE is a neurodegenerative condition linked to repeated head impacts, and it remains difficult to diagnose accurately during life. One of the main challenges is that the disease’s symptom profile has not yet been fully defined. The BU study’s findings help fill that gap, offering a clearer picture of the cognitive impairments that may signal the presence of CTE in living patients.

These results could inform future diagnostic criteria and improve early detection of the disease, though researchers caution that additional studies are needed to validate the findings across broader populations. The work represents a significant step toward understanding how repeated head trauma translates into measurable cognitive decline.