When most people think of a concussion or traumatic brain injury (TBI), they expect symptoms like headaches, blurred vision, or dizziness to show up right away—and then fade. But the truth is, TBIs can affect the brain for months, years, or even decades. Doc knows this firsthand. After his own childhood car accidents, he went from being an honor roll student to struggling with basic math and science. While his symptoms eventually improved, the brain injury left him with anxie