From October 2021 – The U.S. National Institutes of Health reported on a study that might demonstrate a link between post-trauma brain activity and symptoms of anxiety and PTSD.
The study doesn’t directly address the long term factors that contribute to Complex PTSD. Instead the study focuses on short-term instances of trauma, single event situations. Still, the information might allow researchers to being to detect the mental activity patterns that are prevalent in Complex PTSD. That could lead to a discernable physical marker for diagnosis?