Effect of Light on Cognitive Function During a Stroop Task Using Functional Near-Infrared Spectroscopy

Figures

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  Fig. 1. Task procedures and materials. a The color–word matching Stroop task rule; b the task process time; c the setting up of the fNRIS channels; d the actual testing arrangement

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  Fig. 2. The Stroop task performance results. a Response times under three light conditions; b accuracies under three light conditions

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  Fig. 3. The brain activations under the different light conditions during the Stroop task. a The brain activation under the 4500 K light condition; b the brain activation under the 2500 K light condition; c the brain activation under the no-light condition

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  Fig. 4. The significant difference between the Oxy-Hb concentrations of the channels. a The comparison of the Oxy-Hb concentrations under the 2500 K and 4500 K light conditions; b the comparison of the Oxy-Hb concentrations under the no-light condition and the 4500 K light condition.

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  Fig. 5. Mean Oxy-Hb concentration in ROIs under three light conditions. a Mean Oxy-Hb concentration in ROIs under the 4500 K light condition; b mean Oxy-Hb concentration in ROIs under the 2500 K light condition; c mean Oxy-Hb concentration in ROIs under the no-light condition

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  Fig. 6. The effects of light on behavioral performance. a Overall effects of light on behavioral performance; b effects of light on behavioral performance in males; c effects of light on behavioral performance in females