Fig. 6.

The first and second rows present the topographic map of fatigue-related index ($PS{D}_{\theta }+PS{D}_{\alpha }$)/$PS{D}_{\beta }$ constructed through integrating the channel-based fatigue index, means of the every 10 mins of subject 1. The third and fourth rows present the topographic map of fatigue-related index $PS{D}_{\theta }$/$PS{D}_{\beta }$) constructed through integrating the channel-based fatigue index, means of the every 10 mins of subject 1