Parts of your post sound more TOS related - but I'm not an expert on the differences between TOS and RSD.

I thought that one of the nerves being affected from a TOS compression can cause the claw hand too??

I don't know if you remember curldfingers from the old forum?

But she probably has RSD too.

Filing and sorting papers really affected my TOS sx - they put in in as office helper when on modified work - all the pinching and gripping finished me off- LOL.
Of course they thought I only had RSI back then.
But still a bad job for a person with RSI too.
{RSI= repetitive strain injury}