I suffered 12 yrs ago a TBI that also had caused TMJ through loss of bone in the joint from the impact. I have a tendency now to stutter or become like a broken record. I've learned over the years to control this but at the cost of speaking more slowly and having pronounced pauses as I mentally repeat until the word comes out. It's reduced, not alleviated. On areas where I am confident of what to say, typically practiced material, there is minimal stuttering or pausing. If questioned on material not rehearsed, I mentally go over the response a couple times before attempting to speak. This results in a prolonged pause, but for some gives an impression that I am considering before replying. For lots of information or complex topics, I provide emails and invite for one on one discussion for clarity. There are plenty of speech impediments, like those who only know how to swear (phouque this, phouquers keep phouquing up) or use broad generalities (its wrong, take care of it...get it done.). A stutter is very tame in comparison.