On this episode of "This Is Only A Test", Mickey Urdea is banging his head against the issue of traumatic brain injuries, or TBI! Globally, 69 million people suffer traumatic brain injuries every year, yet there have been very few successful quantifiable diagnostics available aside from field tests for noticeable symptoms. Mickey goes deep into the known diagnosable symptoms of TBI, the FDA-approved tests in the field, and the latest research on acetylated tau proteins as a surrogate endpoint. Now strap your helmet on and brace for impact on "Getting Our Heads Around TBI!"