Are jerky arm movements signs of multiple sclerosis?

Nonspecific: Jerky arm movements could be a sign of cerebellar ataxia, but could also represent a variety of tremors, chorea, myoclonus, and even focal seizure activity. Sure, some pts might have ms, but others might have essential tremor, parkinson's, huntington's, brain tumors or bleeds, etc. An expert neurologist can sort all of this out and pinpoint the diagnosis.