I have this and I'm not even a good guitarist, but I used to practice every day. Now my index finger curls into my palm whenever I try to play. It sucks, and cratered my practice time because now practice is just frustrating. I hope someone figures out a way to retrain, but I haven't seen a lot of solutions in the reading I've done.
From the article: "Flow and ease can be the most challenging parts of recovery, because they require developing the habit of intentional, slow and mindful movement. "
I'd recomment Jamie Andreas and the book The Principles of Correct Practice For Guitar, there is a lot of ideas about correctly practicing without forcing it.
