dr. robert stern and chris nowinski. dr. stern is director of boston university of school of medicine. he is director of the clinical corps of the boston university alzheimer's disease center. he received undergraduate from welllynn university. he served on the faculty of brown medical school and the university of north carolina school of medicine. dr. stern's research has led to more than 250 peer review publications and helped us to better understand the effects of trauma and aging on the human brain. he's here today with m r. nowinski who is the cofounder and director of sports institute. it is focused on addressing the issue of brain trauma through education, through policy and through research. he received his undergraduate degree from harvard university where he played defensive tackle for the football team. after college, he became a professional wrestler. in his own experience in that sport with head trauma, led him to cofound the sport's legacy institute. he currently serves as an advisor on the nfl players association traumatic brain injury committee and ivy league concussion

dr. robert stern i am a phd at the boston school of medicine. am the director of the boston university alzheimer's disease center. for the past 25 years, i have been conducting clinical neuroscience research into issues pertaining to the aging brain. in particular, alzheimer's disease. since 20 oh eight, my research is focused on the long-term consequences of repetitive brain trauma and athletes -- in athletes. t.have been studying ce brain a progressive disease that can lead to dramatic changes in mood, behavior, and cognition, dementia. leading to it is similar to alzheimer's disease, but it is a unique english easily this through postmortem neuropathological examination. orginally called punch drunk dementia appeared to list the listica inentia pugi the early 1900s when it was only got to happen to boxers, it is widespread. it has been found in athletes ranging from football, soccer, and rugby players. for somesuggests, individuals, repetitive impacts to the head trigger a cascade of events that lead to the destruction of brain tissue. these