This may be of interest to people here with Dystonia/tremor

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Rare Diseases Clinical Research Network (RDCRN)

Review Examines Tremor in Dystonia

New research from the Dystonia Coalition: jns-journal.com/.../S0022-5...

Dystonia is a general term for a group of movement disorders characterized by uncontrollable, sometimes painful, involuntary muscle contractions, resulting in repetitive shaking, turning, and twisting of affected body parts. Dystonia is a rare disorder, but it often coexists with a more common disorder, tremor. The reasons for the frequent co-occurrence of dystonia and tremor are not clear.

In this review article, researchers outline the differences in definitions, subtypes, and pathophysiology of dystonia and tremor. They outline some controversial topics, such as whether these two problems share a similar pathophysiology.