Journal of Biomedical Engineering Research (대한의용생체공학회:의공학회지)

The Korean Society of Medical and Biological Engineering (대한의용생체공학회)
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Estimation of Visual Evoked Potentials Using Time-Frequency Analysis

시-주파수 분석법을 이용한 시각자극 유발전위에 관한 연구

  • 홍석균 (연세대학교 보건과학대학 의용공학과, 의공학 연구소) ;
  • 성홍모 (연세대학교 보건과학대학 의용공학과, 의공학 연구소) ;
  • 윤영로 (연세대학교 보건과학대학 의용공학과, 의공학 연구소) ;
  • 윤형로 (연세대학교 보건과학대학 의용공학과, 의공학 연구소)
  • Published : 2001.06.01
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Abstract

The visual evoked potentials(VEPs) is used to assist in the diagnosis of specific disorders associated with involvement of the sensory visual pathways. The P100 latency is an important parameter which is diagnosis of optic nerve disorders. There are characteristics of latency delay, wave distortion, amplitude deduction in abnormal subjects. It is difficult to diagnose in the case of producing peak at the P100 latency. In this paper, difference of pattern between normal VEPs and abnormal VEPs using the Choi-Williams distribution method is studied. We observed the relationship about time and spectrum. The result shown that normal VEPs had maximum spectral value at 20Hz~26.7Hz and abnormal VEPs had maximum spectral value at 16.7Hz~20Hz. Also normal VEPs spectrum is higher than abnormal VEPs spectrum.

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