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I agree with you. I think the physical motion of writing is involved in the process, activating neurons that just flicking fingers doesn't.

Would be fascinating to see it in an fMRI.



There is a psychiatric condition known as 'graphomania' in which one has an obsessive compulsion to write, the content being secondary in importantce. So it's conceivable that such a structure in the brain exists and can become overstimulated.

https://en.wikipedia.org/wiki/Graphomania




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