Brain Vs. Mouf'

I have this other symptom: I think "cat" but say "dog". It's like the word is in my head, and either I stutter, or I come up with a substitute word that isn't quite right. My best friend Dave told me on the phone a couple of nights ago what the proper term is for that disconnection, but I can't remember what he said.

I guess that's another problem all together.