u/Ax3P I noticed in your stutter [hypothesis](https://drive.google.com/file/d/11C_LSzYWEdqLq6Li6JmuyhiYc0KYhVqN/view?usp=sharing), that you said: "*Selective suppression (aka voluntary tic* *inhibition): This differs from the inhibition of other hyperkinesias, where patients usually non-selectively suppress their global motor output or impose external constraints to reduce intensity of involuntary movements*." And, "*Stuttering is not a type of hyperkinesia*." Perhaps you might be interested in this research. This research discusses kinesia paradoxa (dramatic alterations in a person with Parkinson’s ability to move based on environmental changes). They make a link to stuttering. This research hypothesizes: "*The underlying system that contributes to stuttering is the movement system and the reward system. Stuttering is a movement disorder with reward processing at its root*" [https://understandingdysfluency.com/2017/10/31/stuttering-revealed-as-disorder-of-movement-reward-the-unconscious-kinesia-paradoxa-treatment-therapy-motor-system-parkinsons-punishment](https://understandingdysfluency.com/2017/10/31/stuttering-revealed-as-disorder-of-movement-reward-the-unconscious-kinesia-paradoxa-treatment-therapy-motor-system-parkinsons-punishment)