Reading this article reminded me of an admonishment I often heard as a child - dreaming about stuff does not make it real, you have to work for it. That position would be worth reconsidering now.
Somewhere in our writing thought process, we form the intention of using a specific character, and using an implant to track this intention could potentially work. Unfortunately, the process is not especially well understood.
Downstream of that intention, a decision is transmitted to the motor cortex, where it's translated into actions. Again, there's an intent stage, where the motor cortex determines it will form the letter (by typing or writing, for example), which is then translated into the specific muscle motions required to perform the action.
There is indeed a tenuous path from dreaming to doing. My handwriting has been on a downward slide for decades with no signs of improvement despite switching to a fountain pen for note-taking. I thought that for sure would help. The decline in quality could hold indicators for my health if I knew what to look for.
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