Acta Neurochirurgica

, Volume 154, Issue 3, pp 509–515 | Cite as

Assessment of non-motor hearing symptoms in hemifacial spasm using magnetoencephalography

  • Young Seok Park
  • Bong Soo Kim
  • Dong Kyu Lee
  • Seung-Koo Lee
  • Hyuk Chan Kwon
  • Kiwoong Kim
  • Yong Ho Lee
  • Jin Woo Chang
Clinical Article

Abstract

Background

Hemifacial spasm patients often suffer from non-motor symptoms such as tinnitus. These non-motor symptoms are known to be associated with changes in cortical activity. Magnetoencephalography (MEG) is a technique that can record brain activity noninvasively. To determine the usefulness of MEG in assessing changes in cortical activity associated with non-motor hearing symptoms in hemifacial spasm patients.

Methods

We used MEG to evaluate the reactivity of the auditory cortex in 26 hemifacial spasm patients. We divided patients into a subjective tinnitus group (n = 10) and a non-tinnitus group (n = 16). The latency and amplitude of the most prominent deflection, N100m, was compared between the two groups.

Results

There was a significant difference in the pure tone audiogram on the spasm side compared with the non-spasm side. After stimulation on the spasm side, the amplitude of the N100m peak in the contralateral hemisphere was lower in the subjective tinnitus group than in the non-tinnitus group.

Conclusions

Our results indicate that MEG can detect differences in cortical activity between hemifacial spasm patients with and without tinnitus. This suggests that MEG can identify changes in cortical activity associated with non-motor symptoms.

Keywords

Dysynchronization Hearing Hemifacial spasm MEG 

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Copyright information

© Springer-Verlag 2011

Authors and Affiliations

  • Young Seok Park
    • 1
    • 4
  • Bong Soo Kim
    • 1
  • Dong Kyu Lee
    • 1
  • Seung-Koo Lee
    • 2
  • Hyuk Chan Kwon
    • 3
  • Kiwoong Kim
    • 3
  • Yong Ho Lee
    • 3
  • Jin Woo Chang
    • 1
  1. 1.Department of NeurosurgeryYonsei University College of MedicineSeodaemoon-GuKorea
  2. 2.Department of Radiology, Severance Hospital, MEG Center, Severance Hospital Brain Korea 21 Project for Medical Science, Brain Research InstituteYonsei University College of MedicineSeoulKorea
  3. 3.Center for Brain and Cognitive Science ResearchKorea Research Institute of Standards and ScienceDaejeonKorea
  4. 4.Department of Neurosurgery, Bundang CHA Medical CenterCHA UniversitySeongnamKorea

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