Welcome to NT
That's not something I know about. I did Google the Dx and found lots of info.
http://www.google.com/search?source=...0&oq=myoclonus You've probably done that already.
Here is our link to rare disorders:
http://neurotalk.psychcentral.com/forum2.html
Someone over there may know something.
This is the definition on our link to medical terminology:
http://www2.merriam-webster.com/cgi-...l&va=myoclonus
If it's neurological and musclular, then what about muscle relaxers. I'd ask about botox. just my simple thoughts.
I hope you find answers and he gets okay real soon.