Bengals wide receiver Chris Henry suffered from a chronic brain injury that may have influenced his mental state and behavior before he died last winter, West Virginia University researchers said Monday.

The doctors had done a tissue analysis of Henry's brain that showed he suffered from chronic traumatic encephalopathy.

Henry died in December, a day after he came out of the back of a pickup truck his fiancee was driving near their home in Charlotte, N.C.

Neurosurgeon Julian Bailes and fellow researchers at West Virginia believe chronic traumatic encephalopathy, or CTE, is caused by multiple head impacts, regardless of whether those blows result in a concussion diagnosis. CTE carries neurobehavioral symptoms, Bailes said — typically, failure at personal and business relationships, use of drugs and alcohol, depression and suicide.

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