SBU researchers find possible link between PTSD in 9/11 responders and cognitive degeneration Cindy MizakuFeaturedNewsTop StoryMay 2, 2019May 3, 2019 A team of researchers at Stony Brook University conducted a pilot study that suggests there may be a link between chronic post-traumatic stress disorder (PTSD) in 9/11 responders and cognitive degeneration, leading to diseases like Alzheimer’s.