Fig 1.
Driving simulator equipment configuration.
A. An overview of the simulator composed of three-monitor display positioned approximately 90 cm from the participant, steering system, and pedals. B. An example of the high cognitive load scenario in an urban environment with a high density of buildings and traffic. C. An example of the low cognitive load scenario in a rural environment with a low density of buildings and traffic.
Fig 2.
An anterior and posterior view of the optode montage mapped onto a template brain. Red dots denote a channel source and blue dots represent a channel detector. The blue line connecting a source and detector represents a measured channel; each channel is numbered. Note that the labels for channels 18, 19, and 20 are displaced; a straight black line indicates the position of each channel.
Fig 3.
Haemodynamic response of the high load urban scenario compared to baseline.
A, B, C, D = ΔHbO, ΔHbR, ΔCBV and ΔCOE, respectively for all channels. E, F, G, H show data only for channels with statistically significant differences from baseline (p ≤ 0.05) for ΔHbO, ΔHbR, ΔCBV and ΔCOE respectively. Anterior brain view is shown.
Fig 4.
Haemodynamic response of the low load rural scenario compared to baseline.
A, B, C, D = ΔCBV, ΔCOE, ΔHbO and ΔHbR, respectively. E, F, G, H show data only for channels with statistically significant differences from baseline (p ≤ 0.05) for ΔCBV, ΔCOE, ΔHbO and ΔHbR respectively. Anterior brain view is shown.
Fig 5.
Between-scenario differences in the haemodynamic response.
A, B, C, D = ΔHbO, ΔHbR, ΔCBV and ΔCOE, respectively. E, F, G, H show data only for channels with statistically significant differences from baseline (p ≤ 0.05) for ΔHbO, ΔHbR, ΔCBV and ΔCOE respectively. No statistically significant differences are present for panels E-H. Anterior brain view is shown. Note: The scale differs from that used in Figs 2 and 3.