孤立性笑性震颤病例系列：其现象学是什么？
A Case Series of Isolated Smiling Tremor: What Is the Phenomenology?
机构信息
Department of Neurology, Division of Movement Disorders, Albany Medical Center, Albany, New York, USA.
Department of Neurology, Division of Movement Disorders, Columbia University Irving Medical Center, New York City, New York, USA.
出版信息
Mov Disord Clin Pract. 2024 Feb;11(2):171-174. doi: 10.1002/mdc3.13938. Epub 2023 Dec 9.
BACKGROUND
Five cases of tremor only upon smiling have been reported where no facial tremor is present at rest, when talking, or with full smile.
CASES
This report highlights four cases of tremor upon partial smiling, discusses the phenomenology of smiling tremor, and reviews the current literature. Four subjects with lower facial tremor present only upon smiling underwent movement disorders evaluation with video. Tremor frequencies were determined by parsing the video clips into 1-second intervals and averaging the number of oscillations per interval and were determined to be high-frequency 8 to 10 Hz irregular facial tremors with harmonic variations upon moderate effort in all cases. Slight or full-effort smiling did not elicit facial muscle oscillations. Subjects had no other signs of tremor, dystonia, or parkinsonism on examination or in family history.
CONCLUSIONS
Tremor upon smiling only, or isolated smiling tremor, is a unique task- and position-specific tremor of the facial musculature.
背景
有五例仅在微笑时出现震颤的病例，在休息、说话或大笑时均无面肌震颤。
病例
本报告重点介绍了四例部分微笑时出现震颤的病例，讨论了微笑震颤的现象学，并复习了目前的文献。四名仅在微笑时出现下部面肌震颤的受试者接受了运动障碍评估，并进行了视频记录。通过将视频片段分割成 1 秒钟的间隔，并计算每个间隔的振动次数来确定震颤频率，结果显示所有病例的震颤频率均为 8 至 10 Hz 的高频不规则面肌震颤，在中等用力时呈现谐波变化。轻微或全力微笑不会引起面部肌肉的振动。受试者在检查或家族史中均没有其他震颤、肌张力障碍或帕金森病的迹象。
结论
仅在微笑时出现的震颤，或孤立的微笑震颤，是一种独特的、与任务和姿势相关的面部肌肉震颤。
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