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Brain-computer interface using a simplified functional near-infrared spectroscopy system.

Shirley M Coyle1, Tomás E Ward, Charles M Markham

  • 1National Centre for Sensor Research, Dublin City University, Glasnevin, Dublin 9, Ireland. shirley.coyle@dcu.ie

Journal of Neural Engineering
|September 18, 2007
PubMed
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This study introduces a custom near-infrared spectroscopy (NIRS) system for brain-computer interfaces (BCIs). The functional NIRS-BCI system demonstrates potential for simple control, paving the way for further research.

Area of Science:

  • Neuroscience
  • Biomedical Engineering
  • Optical Imaging

Background:

  • Brain-computer interfaces (BCIs) enable device control via thought.
  • Near-infrared spectroscopy (NIRS) is a non-invasive optical technique for measuring cortical brain activity.
  • NIRS offers safety, portability, and accessibility advantages for BCI applications.

Purpose of the Study:

  • To develop and evaluate a custom-built functional NIRS (fNIRS) system for BCI applications.
  • To investigate the feasibility of using fNIRS for motor imagery-based control.
  • To present fNIRS as an accessible and affordable alternative for BCI research.

Main Methods:

  • Construction of a custom multi-channel NIRS system.
  • Implementation of the 'Mindswitch' fNIRS-BCI application utilizing motor imagery.

Related Experiment Videos

  • Online analysis of fNIRS data with user performance feedback.

    • Main Results:

    • The fNIRS-BCI system successfully supported basic 'on/off' switching functionality.
    • Initial results indicate significant potential for fNIRS in BCI applications.
    • Performance, while currently basic, shows promise for improvement with advanced signal processing.

    Conclusions:

    • fNIRS is a viable and accessible technology for developing simple BCI systems.
    • The developed fNIRS-BCI system demonstrates potential for future advancements.
    • This work encourages further exploration and research in the fNIRS-BCI field.