Yes its called neuroplascity. What exactly causes the neurons to wire wrong and or short circuit idk. But by pushing through blocks and struggling with almost mini seizures while talking aka facial ticks and such. We tell our Brain this is working and keep it up. Neurons that fire together wire together. What I have been doing is not stuttering or at least trying not to. I know some people would say that's impossible, and it is hard. Sometimes it's means I just don't say that word. When I start to stutter I stop I put the brakes try and center myself and use various tools to not engage those stuttering pathways. It's working I still struggle and probably have one or 2 major blocks a day but I try and not focus on them and instead focus on when I am fluent and celebrate every victory even how small. Also daily affirmations, and meditation. Also I record myself talking and listen to me speaking fluently. Will this work for everyone, I don't believe so, but it's working for me. I hope you are able to as well. I am looking into to lions mane also as a potential helpful supplement.