Journal of Biomedical Engineering Research (대한의용생체공학회:의공학회지)

The Korean Society of Medical and Biological Engineering (대한의용생체공학회)
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Changes in Event-related Potentials and Gamma-band Activities due to the Difficulty of Auditory Oddball Task

청각적 Oddball 작업 수행 시 난이도에 따른 사건관련 전위 및 감마대역 활동 변화 특성

  • Choi, Jeong-Woo (Department of Biomedical Engineering, College of Health Science, Yonsei University) ;
  • Yoon, Jin (Department of Biomedical Engineering, College of Health Science, Yonsei University) ;
  • Kim, Chi-Hyun (Department of Biomedical Engineering, College of Health Science, Yonsei University) ;
  • Kim, Kyung-Hwan (Department of Biomedical Engineering, College of Health Science, Yonsei University)
  • 최정우 (연세대학교 보건과학대학 의공학과) ;
  • 윤진 (연세대학교 보건과학대학 의공학과) ;
  • 김지현 (연세대학교 보건과학대학 의공학과) ;
  • 김경환 (연세대학교 보건과학대학 의공학과)
  • Published : 2009.08.30
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Abstract

The purpose of this study is to observe the change in gamma-band cortical activities (GBAs) due to task difficulty. Event-related potential and gamma-band activity were investigated using electroencephalograms recorded during auditory oddball tasks with two difficulty levels. For more difficult task, the amplitude of P300 decreased and the peak latency of P300 was delayed significantly compared to easier task. The induced GBA decreased considerably during the P300 latency period and the peak latency of the induced GBA was delayed for more difficult task. The results imply that the difficulty-related change in cortical information processing may be implemented as a change in the strength of local neuronal association.

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References

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