fNIRS Lab
Functional near-infrared spectroscopy shines harmless near-infrared light through the scalp and reads how much it's absorbed — tracking oxygenated (HbO) and deoxygenated (HbR) haemoglobin as the brain works. Switch between three real recordings — motor, auditory and prefrontal — and play the averaged response, watching that region light up. Real open data (OpenNeuro) — see credits below.
Recording
Condition
Playback
Real, openly-licensed data — three CC0 OpenNeuro recordings, block-averaged.
Motor (3 s vs 2 s hand movement) — ds005963 (FRESH Motor, Mesquita);
Auditory (speech vs noise) — ds005964 (FRESH Audio, Luke/Shader/McAlpine);
Prefrontal (incongruent vs congruent Stroop) — ds006459 (Word-Colour Stroop, Anderson et al.). All CC0.
Raw 760/850 nm intensities were converted to HbO/HbR with the modified Beer–Lambert law in
MNE-Python (optical density → haemoglobin, ppf 6, 0.01–0.2 Hz band-pass), then block-averaged on the condition events.
Amplitudes are in micromolar (µM) — real fNIRS responses are small. The prefrontal/Stroop response is HbO-dominant (HbR is near-flat over frontal cortex, a known fNIRS limitation). Rendered on
<canvas>. Not for diagnosis.