Concussions, and other types of mild traumatic brain injuries, are risk factors for dementia. This study aims to explore if biological markers of aging and dementia can distinguish adults with and without histories of concussion. Additionally, this study includes a 12-week cognitive intervention to promote brain health. The intervention is called "NeuroTracker" and is a simple video game that can be done from home!

There are three components in this study. First, a baseline assessment consisting of Magnetic Resonance Imaging (MRI) to look at brain structure, blood and saliva collection to examine markers of inflammation and brain integrity, and cognitive assessments to see how the brain processes information. Second, a 12-week intervention (cognitive training or waitlist control). Third, follow-up assessments (1-week and 6-months) consisting of MRI, blood and saliva collection, and cognitive assessments.