When I initially began developing muscle spasms, resultant my brain injury, my whole hand clenched. Some tension still remains. However, my middle finger (known in sign language circles as the 'feeling finger,' connoting its utility) as of late is much more functional.
Some of the gain presumably comes from the increase in muscle relaxers that I am now taking. I kept my level low while I was in school (they made me kind of foggy). But now that I'm done with grad school and society seems to be more geared to the eighth grade level, I shall be less opposed to letting the fog roll into my harbors.