History of mild traumatic brain injury is associated with deficits in relational memory, reduced hippocampal volume, and less neural activity later in life oleh Jim M Monti, Jim M Monti, Michelle W Voss, Ari ePence, Edward eMcAuley, Edward eMcAuley, Arthur F Kramer, Arthur F Kramer, Arthur F Kramer, Neal J Cohen, Neal J Cohen, Neal J Cohen