Speech-related Tremor of Lips:A Focal Task-specific Tremor Shuhei Morita 1 , Rieko Takagi 1 , Hideto Miwa 1 , Tomoyoshi Kondo 1 1Department of Neurology, Wakayama Medical University Keyword: tremor , task-specific tremor , essential tremor , task-specific dystonia pp.327-329
Published Date 2002/4/1
DOI https://doi.org/10.11477/mf.1406902125
  • Abstract
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We report a 66-year-old Japanese woman in whom tremor of lips appeared during speech. Her past and family histories were unremarkable. On neurological examination, there was no abnormal finding except the lip tremor. Results of laboratory findings were all within normal levels. Her MRI and EEG were normal. Surface EMG studies revealed that regular grouped discharges at a frequency of about 4-5 Hz appeared in the orbicularis oris muscle only during voluntary speaking.

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