I find this finger thing very interesting as I did that right & left brained thing.
I turned out to be right brained & the right side of the brain controls the left side of the body as the nerve bundles are crossed over or something like that especially in the visual area.
Now add to this right vs left hand & foot size.
My left hand & foot are slightly larger than my right.
Being right brained would mean your left eye should dominate
& I theorize that would most likely mean you could lead with your left side & that could naturally cause your left side & extremities to be slightly more developed.
I can isolate my fingers better on the left side too & I am probably supposed to be a lefty but since what should have been my dominant left eye always had poor sight maybe my left side did not devellop as much as it might have.
I know its confusing & slightly complicated but it is very interesting!!!!
More about left & right side differences
http://www.viewzone.com/bicam.html
Our society relies & values the left brain side. Tests are skewed to favor the left brained dominated people leaving us right brained people in a less understood zone. Guess that's why I don't put as much value on the letters of wroting as I do with the content ofth ought...LOL
I also was only average in math & I would not make a great astrophysict
It's my weaker left brain....

~Shadow~

There is a seed within called hope
Waiting for the chance to grow
There's forever flowing from your soul
Waiting for the spirit to be flown