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Vocal tremor reduction with deep brain stimulation.

M S Yoon1, M Munz, R T Sataloff

  • 1Department of Neurosurgery, Temple University, Philadelphia, PA 19140, USA. myoon000@nimbus.temple.edu

Stereotactic and Functional Neurosurgery
|June 15, 2000
PubMed
Summary
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Deep brain stimulation (DBS) of the thalamus significantly reduced vocal tremor in a patient with essential tremor. Post-surgery, acoustic analysis confirmed a marked decrease in vocal tremor frequency, demonstrating DBS efficacy.

Area of Science:

  • Neurology
  • Neurosurgery

Background:

  • Essential tremor (ET) is a common neurological disorder.
  • Vocal tremor can significantly impact quality of life.
  • Thalamic deep brain stimulation (DBS) is an established treatment for essential tremor.

Observation:

  • A 72-year-old female with essential tremor presented with moderate vocal tremor (rated 3/5).
  • Preoperative acoustic analysis showed vocal tremor affecting voice amplitude at 5.58 Hz.
  • Endoscopic visualization of vocal cords revealed tremor during stimulation.

Findings:

  • Bilateral thalamic DBS improved vocal tremor rating to 1/5.
  • Postoperative acoustic analysis showed reduced vocal tremor frequency to 1.93 Hz (both leads on) and 1.54 Hz (left lead on).
  • Stimulator activation/deactivation correlated with visible changes in vocal cord tremor.

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Implications:

  • Thalamic DBS is a viable therapeutic option for managing vocal tremor in essential tremor.
  • This case highlights the potential for DBS to improve speech production and quality of life.
  • Further research into optimal DBS parameters for vocal tremor is warranted.