Figure 1
From: Seasonality and light phase-resetting in the mammalian circadian rhythm
Subpopulations and coupling in the SCN. Light input comes into the sensor cells in the ventral SCN through the retinohypothalamic tract (RHT). The majority of the dorsal cells do not receive direct input from the RHT but are bidirectionally coupled to the ventral sensor cells. Coupling terms are labeled as in Eq. 1.
