What have we learned from the use of MRIs?
I have searched the Web for this and found it difficult to get a simple direct answer. I would divide my question into two parts. Firstly, what kinds of disorders can be detected using MRIs? Secondly, what do MRIs tell us about the way the brain works? I am not looking into any detailed descriptions, just an overview of the kinds of things that we have learned.
This question is in the General Section. Responses must be helpful and on-topic.