My brain exhibits significant differences on EEG that the neuro-doctor said are suggestive of ADHD or ASD.

AFAIK it is visible on fMRI, but doing so is incredibly expensive and taxing on the person - you'd need to keep them in the fMRI for very long time, repeatedly, and watch them doing different tasks.

But I've seen papers about this where they did that with some people. The brain simply doesn't fire up like a normal brain does. The structural difference itself might be too small (on cellular or even molecular level) to see with current resolution, but the effect is clearly visible - as well as that medication makes the brain behave more like normal brains.

Quick search:

- https://www.medicalnewstoday.com/articles/315884

- https://bmcmedimaging.biomedcentral.com/articles/10.1186/s12...

Oh, that's interesting. Thank you.

ADHD brains operate differently, which is clearly visible on imaging. However, this is not sufficient for a diagnosis because you still need impairment in your life.