I posted about this earlier, so I won't get into the full explanation, but we stutterers can actually experience blocks with our hands. Part of it is an issue with initiating motor action, and some of it may be incomplete segregation of motor control of our mouth and hands. ​ [Here](https://www.reddit.com/r/Stutter/comments/pl522u/neuropathology_why_stutterers_brains_produce/?utm_source=share&utm_medium=web2x&context=3) is my original post, you can skip down to the "Execute" section to see the parts about our fingers and hands.