Many ADHD people have to cope with the co-morbid trait of anxiety. Dealing with ADHD and anxiety while playing the game of golf can be very tricky.
The neocortex has a huge role in where and when our anxiety surfaces. Simply put, the neocortex builds models of things in order to predict the future. The models can be nested, associated with other models, … don’t dwell on this too much, it will make your head hurt. The point is that the neocortex adds the emotional state that you are in to the models it builds.