I hope not, but he`s got this for years and I don`t think that he would pass the medical tests or that Dana would let fight him if it`s parkinson
For sure he will suffer later in life from the residual effects that come with combat sports. But Parkinsons to my knowledge is genetic. Much like Ali some fighters develop a similar ailment to it because of the neurological damage/trauma. That though looks more like a tick. As opposed to Parkinsons which usually causes tremor's.
That could be from anything. Muscle twitching is also a common medication side-effect. Maybe he's a crazy nut and is taking a bunch of anti-psychotics.
[ame]http://en.wikipedia.org/wiki/Parkinsonism[/ame] See Drug-induced parkinsonism (due to drugs such as antipsychotics, metoclopramide, MPTP)
He has been ko'd badly too many times. He is in the same group as Arlovski. I remember seeing that twitching and it was alarming.