A dataset from the Aging, Dementia and Traumatic Brain injury trial is available from The Allen Institute for Brain Science. The study pulls from at the Adult Changes in Thought (ACT) Study. It drills down to nervous system, molecular and transciptome levels of brains and TBI exposure from a longitudinal population-based prospective cohort study of brain aging and incident dementia in the Seattle metropolitan area. The site’s overview page provides a tutorial on finding relationships between samples and parameters.