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Assessment of cognitive neural correlates for a functional near infrared-based brain computer interface system
Book chapter   Open access

Assessment of cognitive neural correlates for a functional near infrared-based brain computer interface system

Hasan Ayaz, Patricia A. Shewokis, Scott Bunce, Maria Schultheis and Banu Onaral
Foundations of Augmented Cognition: Neuroergonomics and Operational Neuroscience - 5th International Conference, FAC 2009, Held as Part of HCI International 2009, Proceedings, v 5638, pp 699-708
2009
DOI: https://doi.org/10.1007/978-3-642-02812-0_79
url
https://doi.org/10.1007/978-3-642-02812-0_79View
Published, Version of Record (VoR) Open Maybe Open Access (Publisher Bronze)

Abstract

Brain computer interface fNIR Near infrared spectroscopy
Functional Near Infrared Spectroscopy (fNIR) is a promising brain imaging technology that relies on optical techniques to detect changes of hemodynamic responses within the prefrontal cortex in response to sensory, motor, or cognitive activation. fNIR is safe, non-invasive, affordable, and highly portable. The objective of this study is to determine if biomarkers of neural activity generated by intentional cognitive activity, as measured by fNIR, can be used to communicate directly from the brain to a computer. A bar-size-control task based on a closed-loop system was designed and tested with 5 healthy subjects across two days. Comparisons of the average task and rest period oxygenation changes are significantly different (p<0.01). The average task completion time (reaching +90%) decreases with practice: day1 (mean 52.3 sec) and day2 (mean 39.1 sec). These preliminary results suggest that a closed-loop fNIR-based BCI can allow for a human-computer interaction with a mind switch task.

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