I don't know a lot about movement disorders. I get myoclonus jerking, a involuntary jerking of my legs, preventing me from walking. I also cannot stand because my legs unlock and buckle. It is triggered in me by dizziness, and caused from brain stem damages (as far as I can figure out) as a result of an adult onset leukodystrophy. It happens too with people with MS, but is not one of the presenting symptoms. Certain lights will set me off. Looking up for too long will also. The low blood pressure dizziness, when going from sitting to standing will trigger me.
It is something like hiccups. I get those everyday too. But I am sorry I do not know much about movement disorders. What I have is just one of my many symptoms, and I can live it.