It sounds like an impinged ulnar nerve. That's exactly the symptoms I had when I did it to BOTH arms at IMAZ a couple of years ago.
Google "cyclist palsy" or the Ulnar nerve and you should find plenty of info on it.
My doctor told me there wasn't much I could do, and eventually (about 2 mos. for total healing) my hands came back to normal. But yeah, I had "claws" for a week or so. I remember needing to use BOTH hands to start the car!
YIPES!!