Preston Stroup/Associated Press
Former Detroit Lions running back Mel Farr, who died of a heart attack in 2015, had Stage 3 chronic traumatic encephalopathy (CTE), according to Pia Malbran of ESPN's Outside the Lines.
Dr. Ann McKee, the director of Boston University's CTE Center and a professor of pathology and neurology at the Boston University School of Medicine, spoke about Farr's condition with Malbran.
"Mr. Farr had Stage 3 CTE, which is consistent with other football players of similar age and exposure," McKee said. "At Stage 3, the disease is widespread, but most severe in the frontal lobes as well as the medial temporal lobes, specifically the hippocampus, which plays a critical role in forming new memories, and the amygdala, which governs emotion.