In Reply Ideally, a definition of tremor should accurately include tremulous entities while excluding other nontremulous disorders.
We do not agree that irregular and rhythmic are mutually exclusive. Dystonic tremor has a rhythmicity but may be more irregular in terms of symmetry about a joint (eg, dystonic “no-no” head tremor may have a more prominent tremor in one direction, whereas an essential tremor should have a symmetrical head tremor) and can vary in amplitude or even presence based on positioning.
Elias WJ, Shah BB. Definitions of Tremor—Reply. JAMA. 2014;312(2):191-192. doi:10.1001/jama.2014.6231