Without listing the actual misconceptions some people have, it's hard to say 'the left brain/right brain divide' is a misconception since I was already aware of this understanding that they just observe in different ways, not that "left brain is creative and right is logical". I grew up with the internet, though, so my understanding didn't solely originate from grade school science books that might be simplifying this phenomenon.
Each time I lose feeling in right side of body, and lose the ability to write. Not 100%, but close enough. Typing is fine however, if slow. Critical thinking goes to crap. Talking is fine. I can still draw, though my motivation goes to crap.
Is weird what stays and what goes.
Last time I looked writing is a left brain activity. Which controls right side.
Usually the right hemisphere is linked with comprehending speech/writing, rather than producing it, so it's interesting that you lose the ability to write. Is your speech affected at all? It could be because writing involves a bunch of other more domain-general brain functions too I guess.