Skip to main content
. Author manuscript; available in PMC: 2015 Jan 1.
Published in final edited form as: Nat Rev Neurosci. 2014 Jun 11;15(7):443–454. doi: 10.1038/nrn3743

Figure 1. Model of the direct and indirect influences light on mood and cognition.

Figure 1

Light can regulate mood and learning secondarily by first modulating sleep and circadian rhythms (indirect pathway), or light can directly affect mood without disrupting sleep or causing circadian arrhythmicity (direct pathway). The effects of light on circadian rhythms, sleep and mood are mediated by ipRGCs.