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Circadian dynamic of the core and shell under short photoperiod and long photoperiod. VIP and AVP circadian profiles were plotted as they are the representative components in the core and the shell. During SP, both the core and the shell have a narrower phase distribution compared to LP. The higher synchronization level results in an increase in the ensemble average amplitude. The simulation was conducted with 200 cells in the core and 600 cells in the shell.
