Before you choose becoming a neurologist, read this [post](https://www.reddit.com/r/Stutter/comments/yeki1g/stutterers_vs_nonstutterers_why_are_there/) about the brains. Basically, as I understand from stutter research, there is no stutter predisposition, since humans are not biologically born with the ability to speak. I much rather like to think in terms of an inherited (predisposing) factor of: * being highly sensitive to sensory input * a weak immune system that predisposes us to catching lots of colds and ear infections during the time we are learning to speak * a highly sensitive or reactive temperament * a tendency to be error-prone (which may be associated with an inherited abnormal dopamine metabolism) All of these things might predispose to stuttering, and also to other similar disorders i.e., OCD and PTSD. Both stutterers as non-stutterers could have these inherited factors, so the inherited factor in itself doesn't cause stuttering. It's the combination with the hypersensitivity and the inability to produce clear-sounding speech that may result in a sort of vicious circle whereby we ended up trying too hard to speak better and probably did all the wrong things. Anything that results in a relatively poor quality of speech or language can predispose to stuttering. The post describes that the brain differences between people who stutter and non-stutterers are mainly caused by monitoring & interventions, see this Exposure Therapy [diagram](https://i.imgur.com/oceLTG6.png). Note, the last column in the diagram (primary / secondary behaviors and interventions) falls under avoiding anticipatory fear which keeps the stutter cycle alive.