대한의용생체공학회:의공학회지 (Journal of Biomedical Engineering Research)

  • 제45권2호
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  • Pages.101-107
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  • 2024
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  • 1229-0807(pISSN)
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  • 2288-9396(eISSN)
대한의용생체공학회 (The Korean Society of Medical and Biological Engineering)
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이중 주파수 tACS를 이용한 안정상태 시각 유발 전위 반응 향상

Enhancing Multiple Steady-State Visual Evoked Potential Responses Using Dual-frequency tACS

  • 김정희 (전남대학교 바이오메디컬공학협동과정) ;
  • 김상수 (전남대학교 바이오메디컬공학협동과정) ;
  • 정영진 (전남대학교 바이오메디컬공학협동과정) ;
  • 김도원 (전남대학교 바이오메디컬공학협동과정)
  • Jeonghui Kim (Department of Biomedical Engineering, Chonnam National University) ;
  • Sang-Su Kim (Department of Biomedical Engineering, Chonnam National University) ;
  • Young-Jin Jung (Department of Biomedical Engineering, Chonnam National University) ;
  • Do-Won Kim (Department of Biomedical Engineering, Chonnam National University)
  • 투고 : 2024.04.12
  • 심사 : 2024.04.24
  • 발행 : 2024.04.30
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초록

Steady-state visual evoked potential-based brain-computer interface (SSVEP-BCI) is one of the promising systems that can serve as an alternative input device due to its stable and fast performance. However, one of the major bottlenecks is that some individuals exhibit no or very low SSVEP responses to flickering stimulation, known as SSVEP illiteracy, resulting in low performance on SSVEP-BCIs. However, a lengthy duration is required to enhance multiple SSVEP responses using traditional single-frequency transcranial alternating current stimulation (tACS). This research proposes a novel approach using dual-frequency tACS (df-tACS) to potentially enhance SSVEP by targeting the two frequencies with the lowest signal-to-noise ratio (SNR) for each participant. Seven participants (five males, average age: 24.42) were exposed to flickering checkerboard stimuli at six frequencies to determine the weakest SNR frequencies. These frequencies were then simultaneously stimulated using df-tACS for 20 minutes, and the experiment was repeated to evaluate changes in SSVEP responses. The results showed that df-tACS effectively enhances the SNR at each targeted frequency, suggesting it can selectively improve target frequency responses. The study supports df-tACS as a more efficient solution for SSVEP illiteracy, proposing further exploration into multi-frequency tACS that could stimulate more than two frequencies, thereby expanding the potential of SSVEP-BCIs.

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과제정보

본 연구는 2023년도 식품의약품안전처의 재원으로 식·의약 안전기술 연구개발사업(RS-2023-00215716)과 2023년도 전라남도 재원으로 전남인재평생교육진흥원 지원을 받아 수행됨.

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