CogFX uses fMRI scans. Do they call them something different, fNCI ?

It sounds like the protocol taught your brain to unlearn the anxiety response that it had been holding to. Good for you.

I bet your perfectionist thought process caused you to be frequently checking for symptoms. An anxious brain will easily manifest the symptoms that are expected.

This fits with the data that says 80% of prolonged PCS sufferers have a pre-existing struggle with anxiety. Perfectionism is a form of anxiety.

Again, good for you.