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Detecting the user mental states from the NIRS-measured hemodynamic signals


S. Perrey, G. Derosiere, G. Dray, Tomas Ward

Publication Type: 
Refereed Original Article
NIRS; Cognitive fatigue; BCI application; Cerebral signals There is a need to develop brain-computer interface (BCI) systems that are able to remain stable in varying psychophysiological conditions (such as during times of mental fatigue) that can disrupt user capability. Attention resources are finite and how a gradual decrease in attention across time – the so-called time- on-task (TOT) effect – can influence neural signals is yet to be identified. This present study investigated in fifteen male volunteers (i) the time course of cortico-spinal excitability through single-pulse transcranial magnetic stimula- tion; and (ii) the changes in activity of pre-motor, primary motor, prefrontal cortex and right parietal areas by means of near-infrared spectroscopy (NIRS), during a sustained attention reaction task (RT) of 30 min duration. Applicability of using NIRS-measured cortical activity in order to classify subject attentional state during the sustained attention task was further tested in a sample of 7 subjects.
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Publication Status: 
Date Accepted for Publication: 
Tuesday, 1 October, 2013
Publication Date: 
Annals of Physical and Rehabilitation Medicine
Research Group: 
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