Typing and writing

There is a strange difference between writing things by hand and typing things by hand. When I'm writing, I feel as if I'm drawing using limited set of symbols in order to convey or record meaning, while when I'm typing I feel as if I'm playing an instrument on a set of scale.

The difference is pronounced when i don't know what to write about. When I am writing on paper I can scrape by, writing more and more until I can draw some distinct frame of thought in my mind. But when I'm typing, I frequently get stuck, and I make bunch of mistakes (of both thought and mechanics) that I usually wouldn't make when I am writing on paper.

The mechanics of the brain doesn't seem to have multiple dedicated physiology for each action it is capable of doing. Rather, brain seem to be running on a single physiology capable of running multiple actions using a single function, through a mechanism of replication. So when I am typing, it might be that the part people use in playing an instrument is actually being diverted for the action of typing, and when I'm writing things by hand, the part of brain dedicated to the act of drawing might be diverted to the act of writing. Would it be going to far to suppose that even the part of the brains dedicated to the act of playing instrument and drawing that I described as being diverted are actually replications of a single, simpler action? A sort of fractal branching that resembles each other while being capable of generating unique novel landscapes....