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• W636411936 abstract "Near-infrared spectroscopy (NIRS) brain-computer interface (BCI) studies have primarily made use of measurements taken from a single cortical area. In particular, the anterior prefrontal cortex has been the key area used for detecting higher-level cognitive task performance. However, mental task execution typically requires coordination between several, spatially-distributed brain regions. We investigated the value of expanding the area of interrogation to include NIRS measurements from both the prefrontal and parietal cortices to decode mental states. Hemodynamic activity was monitored at 46 locations over the prefrontal and parietal cortices using a continuous-wave near-infrared spectrometer while 11 able-bodied adults rested or performed either the verbal fluency task (VFT) or Stroop task. Offline classification was performed for the three possible binary problems using 25 iterations of bagging with a linear discriminant base classifier. Classifiers were trained on a 10 dimensional feature set. When all 46 measurement locations were considered for classification, average accuracies of 80.4±7.0%, 82.4±7.6%, and 82.8±5.9% in differentiating VFT vs rest, Stroop vs rest and VFT vs Stroop, respectively, were obtained. Relative to using measurements from the anterior PFC alone, an overall average improvement of 11.3% was achieved. Utilizing NIRS measurements from the prefrontal and parietal cortices can be of value in classifying mental states involving working memory and attention. NIRS-BCI accuracies may be improved by incorporating measurements from several, distinct cortical regions, rather than a single area alone. Further development of an NIRS-BCI supporting combinations of VFT, Stroop task and rest states is also warranted." @default.
• W636411936 created "2016-06-24" @default.
• W636411936 creator A5030965595 @default.
• W636411936 creator A5084071828 @default.
• W636411936 date "2015-09-01" @default.
• W636411936 modified "2023-09-26" @default.
• W636411936 title "Single-trial classification of near-infrared spectroscopy signals arising from multiple cortical regions" @default.
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• W636411936 doi "https://doi.org/10.1016/j.bbr.2015.04.053" @default.
• W636411936 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/25960315" @default.
• W636411936 hasPublicationYear "2015" @default.
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