Wow..this is really eye opening.
Spacing while writing is a BIG issue with him. Here is a little sample of some of what he does when he writes sentences: "Thecat inthehat." or "The c at in thehat." or "Th e cat in the h at." He also does this when writing his spelling words. Just last week he wrote an entire set of words, three times in a row, with the first letter spaced about an index finger away from the rest of the word. He does write some letters backwards from time to time too. Mainly b,d,q,and p. It's not an occurrence that happens all the time though. My mother actually asked us a few months ago if he was dyslexic and then informed me that she was diagnosed as dyslexic as a child. I was under the assumption that if a child was dyslexic then they would read things backwards and write numbers and letters backwards all the time. I do catch myself quite a bit reading a series of numbers out of order or mixing them up but I never really thought much about it and I don't think its a big deal.
I have not noticed him bending in weird positions while writing but that may be because he never sits correctly in his chair to begin with.

I have also never noticed him rubbing his wrists. He does hold his pencil differently than I do though.
He has a really hard time keeping his words and letter on the lines of his paper too. Sometimes his sentence ends up on the line below the one he was writing on to begin with. Also, when writing spelling words in column form, he slants them down the side of his paper until he is starting the words in the middle of the paper.
Aside from the Mad Minute Math tests, handwriting has been one of my biggest challenges with him.
What exactly is a neuropscyh exam?