I haven't heard of the brain scan part, but AA levels can be used as biomarkers https://sci-hub.se/10.1016/j.mehy.2013.11.018 https://sci-hub.se/10.1016/j.mehy.

I haven't heard of the brain scan part, but AA levels can be used as biomarkers https://sci-hub.se/10.1016/j.mehy.2013.11.018 https://sci-hub.se/10.1016/j.mehy.2013.11.018 Edit: found this https://sci-hub.se/https://journals.sagepub.com/doi/10.1177/1087054715611492 https://sci-hub.se/https://journals.sagepub.com/doi/10.1177/... - apparently there are some indicators.