A former NFL quarterback is taking part in research to help diagnose a brain condition in living individuals. The condition, known as CTE, can currently only be diagnosed after death. The quarterback, who had a 17-year NFL career, recently underwent scans and tests at Boston University to assess the impact of head collisions on his brain.

The research aims to make progress toward diagnosing CTE in the living. The quarterback's participation is seen as a step toward this goal. Further details about the research and the quarterback's involvement are available from the source.

The quarterback's decision to participate in the research is motivated by concerns for his fellow players who have not been as fortunate in their health outcomes.