My background is Bioanalytical Chemistry, essentially the field that would do such a test. Psychology/psychiatry is described by words and behaviors. Neurology uses quantitative measurements of the brain to understand physiological disease. Right now, they don’t intersect in an analytical sense meaning you can’t detect the conditions you describe making measurements with any tools we have. We don’t have the biochemical understanding and possibly the tools to make such measurements. But you know that already.

Will we get there one day? I believe we will. But we are in the Stone Age. In vivo brain measurements are very rudimentary.

There is a great podcast that describes exactly what you are asking: Karl Deisseroth on Lex Fridman podcast. It is the best podcast I heard in 2022.