For the last 3-4 years or so I have noticed a violent shaking in my right leg when I go down stairs, sit for too long, etc. - basically whenever I put some weight on my leg (not all my weight, though). Last December both of my arms started shaking similarly (again, when I am exerting only some strength in my muscles, not all).
At this point I was seen by a neurologist who said my brain MRI was normal but that he thought it might be a central tremor and he put me on propranolol. That made the shaking in my arms occur less and less violently; however, it did not affect my leg at all. He then thought the problem might be primary lateral sclerosis and he put me on baclofen, which again didn't help with the shaking in my leg. After increasing the dosage there for a bit, he switched me to tizanidine which again did nothing (except I got super bad dry mouth with that one). After the tizanidine my doctor said the only other suggestion he has is valium or something similar.
Since I last saw my doctor, I've noticed that my teeth chatter if I hold my bottom jaw just so that my bottom teeth are a bit away from my top teeth. I've also noticed (within the last few weeks) that I seem to be a little less able to control voluntary muscles (i.e. I can keep a beat in my head but my legs don't keep up, I think of the correct spelling of a word and type it all jumbled, etc.).
Does it sound like this is just a central tremor or primary lateral sclerosis and I should just deal with the symptoms and hope they don't get worse, or is there some other affliction I might look into?