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. 2021 May 6;16(5):e0250431. doi: 10.1371/journal.pone.0250431

Fig 3. Real-time functional near infrared spectroscopy (rt-fNIRS) neural feedback system.

Fig 3

The command to move was a visual cue including a cartoon of the brain, the words “Wrist extension—GO”, and a cartoon of the wrist moving from a neutral to an extended position in 1 s. Brain activation during the attempt to extend the wrist was captured by NIRx NIRSport. Output from the NIRSport was synchronized with NIRx NIRStar Version 15, which ran on a dedicated acquisition computer (24-GB RAM, 2.60 GHz, Core i7 processor) running Windows 8. The data were pre-processed and thresholded by custom Matlab code. Matlab output informed Python code how to update the visual participant feedback, shown as a purple color in the brain region. Matlab output also triggered functional electrical stimulation (FES) of wrist extensors. (With permission, [39]).