It has been seen in brains of people who have suffered a series of blows to the head . The only way to diagnose CTE is after death -- by analyzing brain tissue and finding microscopic clumps of an abnormal protein called tau . ` CTE can be diagnosed only after death , but a new diagnosis begins to describe symptoms . People with the disease exhibit behavioral and mood problems , as well as cognitive issues .
It has been seen in brains of people who have suffered a series of blows to the head . CTE can be diagnosed only after death , but a new diagnosis begins to describe symptoms . People with the disease exhibit behavioral and mood problems , as well as cognitive issues .