Retina-clock relations dictate nocturnal to diurnal behaviors.

This article reports on retina-clock relations which dictate nocturnal to diurnal behaviors. It discusses that the electrical and gene expression rhythms in the circadian clock in both nocturnal and diurnal animals have similar phases with respect to dark and light cycle. It suggests that the phase difference in their activity is not caused by differences in the circadian clock but rather by how the clock couples to output mechanisms.