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Disentangling the effects of near-infrared light stimulation and exercise on cognitive function in fNIRS studies
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Disentangling the effects of near-infrared light stimulation and exercise on cognitive function in fNIRS studies
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Journal Article
Disentangling the effects of near-infrared light stimulation and exercise on cognitive function in fNIRS studies
2024
Overview
•Functional near-infrared spectroscopy (fNIRS) has been widely employed to monitor changes in the brain's hemodynamic response during various interventions.•The application of transcranial near-infrared (NIR) light (including via fNIRS) can lead to photobiomodulatory processes which can have an impact on cognitive performance.•Future fNIRS studies should include control conditions that do not include the use of NIR light, to account for possible photobiomodulatory effects deriving from the use of their devices, which may interact with their interventions.
Functional near-infrared spectroscopy (fNIRS) studies often aim to measure changes in the brain's hemodynamic response in relation to a specific intervention. We recently showed how a fNIRS device could induce photobiomodulatory effects on cognition by using its near-infrared (NIR) light. However, so far, fNIRS research has overlooked the stimulatory potential intrinsic to this technique. The work by Kuwamizu et al. (2023) on pupil dynamics during exercise is no exception. Here, we suggest a fix to their experimental design, which could be taken into account in other fNIRS studies, to guarantee an adequate level of control for possible unconsidered photobiomodulatory effects.
Publisher
Elsevier Inc,Elsevier Limited,Elsevier
