Brain Health By Jane Farrell People with Traumatic Brain Injury (TBI) may continue to improve or decline years after their injury, making it a more chronic illness, according to a study published in the June 21, 2023, online issue of Neurology®, the medical journal of the American Academy of Neurology. “Our results dispute the notion that TBI is a one-time event with a stagnant outcome after a short period of recovery,” said study author Benjamin L.