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Differentiation of NIRS signals from multiple cortical regions & development of an automated method for motion artifact removal

Brain-computer Interface - Near-Infrared Spectroscopy (NIRS)

Summary

Brain-computer interfaces (BCIs) establish a pathway between the brain and an external device.  For individuals with severe motor impairments, this pathway can provide a means of communication using only brain activity. Near-infrared spectroscopy (NIRS) is a non-invasive method of measuring blood oxygenation in the cerebral cortex and can be used to detect hemodynamic activity induced by mental task performance for BCIs. In this study, we are looking to differentiate the performance of two specific mental tasks and rest. Furthermore, subject movement is a particular concern in NIRS work, as it can add noise to the optical signals. Yet, this problem has not been thoroughly addressed for BCI applications. In this study, we are also looking to further investigate a solution to this issue. Overall, we hope to improve the robustness of NIRS-BCIs and increase their suitability for daily use in this work.

Researcher(s)

Tom Chau, PhD, PEng

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