Dependence of Cerebral Oxygenation and Task Performance on Coloured Light Exposure and Chronotype: Blue and Red Do Not Have the Same Effects on the Prefrontal Cortex.

Background: In our previous studies, we investigated the right-left asymmetry (RLA) of cerebral tissue oxygenation (StO) at rest in humans and the influence of the individual chronotype (i.e. individual chronobiological disposition) on StO.