Guitar playing(or I should imagine any instrument)has got to be good therapy.I did a lot of damage to my left arm in a motorbike crash just after I'd bought my first really good guitar-nerve damage and multiple fractures to the arm and wrist.The doc put me on guitar practice in the firms time as soon as I got any movement in the hand,which was damned hard work,but I'm still playing the same old D35thirty years on.Hope yor situation is no worse than mine ws.Best of luck.