BMX rider-turned motivational speaker Josh Perry has experienced many ups and downs when it comes to the health of his brain. The lessons he's learned along the way, however, could benefit anyone, whether they've had a TBI or not. In the fourth and final episode of a series on traumatic brain injuries and the recovery process, Dr. Daniel Amen, Tana Amen, and Josh discuss the most important principles to keep in mind when recuperating the brain.