MedicalResearch.com Interview with: Keenan Walker, PhD Johns Hopkins University School of Medicine Baltimore MedicalResearch.com: What is the background for this study? What are the main findings? Response: This study was conducted in response to anecdotal accounts and scientific evidence which suggests that major medical conditions, such as critical illness and severe infections, can have a long-term neurological effect on some individuals. There are quite a few studies to date which have found that critical illnesses, such as severe sepsis, are associated with long-term cognitive impairment. Based on this evidence, we wanted to figure out to what degree critical illness and major infection may affect later brain structure and to determine whether the structural changes associated with these events were similar to those observed in Alzheimer’s disease. Our main finding was that individuals who had one or more critical illness or major infection major infection during the decades leading up to older adulthood were more likely to have smaller brain volumes in brain regions most vulnerable to Alzheimer's disease. (more…)