Unilateral or very asymmetric upper limb tremors with a jerky appearance are poorly investigated. Their clinical classification is an unsolved problem because their classification as essential tremor versus dystonic tremor is uncertain. To avoid misclassification as essential tremor or premature classification as dystonic tremor, the term indeterminate tremor was suggested.

中文翻译：

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孤立性不对称和抽动上肢震颤患者的时间辨别力发生改变

对单侧或非常不对称的上肢颤抖伴生涩外观的研究很少。它们的临床分类是一个悬而未决的问题，因为它们是特发性震颤还是肌张力障碍性震颤的分类是不确定的。为了避免误分类为特发性震颤或过早分类为肌张力障碍性震颤，建议使用术语不确定性震颤。