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fNIRS · interactive explanation

How fNIRS works

Explore how light travels through tissue, how HbO and HbR absorb different wavelengths and how oxygenation changes relate to cortical activity.

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Illustrative optodes and light path

Educational simulation with schematic spectra, anatomy and synthetic responses. It does not measure brain activity, is not a diagnostic test and does not establish CTMM equipment or service availability.

References

Yücel et al., 2021 · Prahl