EEG Information Transfer Changes in Different Daily Fatigue Levels During Drowsy Driving

Figures

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  Fig. 1.. Event-related lane departure paradigm. The solid black arrows represent the driving trajectory. The red point represents the deviation onset. The green point represents the response onset. The blue point represents the response offset. The driver's reaction time (RT) is the time interval from the deviation onset (red point) to the response onset (green point). The next deviation begins 5–10 s after the response offset (adapted from Ref. [5] and [6]).

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  Fig. 2.. Comparison of baseline TE values between channel-pairs across the three different daily fatigue level groups. The red, green, and blue bars are high-risk, reduced, and normal groups, respectively. Standard deviations are also shown.

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  Fig. 3.. Connectivity magnitudes between pairs of EEG channels (Fz, Cz, C3, C4, Pz, and Oz) estimated by transfer entropy among the three different daily fatigue level groups. The red, green and blue curves represent high-risk, reduced and normal groups, respectively.

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  Fig. 4.. Comparison of the connectivity magnitudes between the pairs of EEG channels (Fz, Cz, C3, C4, Pz, and Oz) in the high-risk and the reduced states. The red and green curves are high-risk and reduced groups. *FDR-adjusted p-value <0.05.

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  Fig. 5.. Comparison of the connectivity magnitudes between the pairs of EEG channels (Fz, Cz, C3, C4, Pz, and Oz) in the reduced and the normal states. The green and blue curves are reduced and normal groups. *FDR-adjusted p-value <0.05.

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  Fig. 6.. Comparison of the connectivity magnitudes between the pairs of EEG channels (Fz, Cz, C3, C4, Pz, and Oz) in the high-risk and the normal state. The red and blue curves are high-risk and normal groups. *FDR-adjusted p-value <0.05.

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  Fig. 7.. Differences between the TE values of the high-risk state and the normal state. The red solid arrows indicate that the TE values of the high-risk state were higher than those of the normal states. The blue solid arrows indicate that the TE values of the normal state were higher than those of the high-risk state. The thickness of each arrow is divided into three levels to represent the three different magnitude levels (1–10, 11–20, and 21–40).