a) Average peak time (± SEM) on the first day in vitro normalized to the zeitgeber time (ZT) on the day of slice collection. b) Average phase maps for control and OPC+SSR anteroposterior SCN slices (color-coded in online version). c) Standard deviation of peak time displayed by SCN neurons across all three slices collected from each mouse. d) Average change in cellular phase (± SEM) relative to control conditions (dashed line at 0) across neurochemically-distinct regions. Regions used for each neurochemical group are AVP: 1, 4, 7, 8, Other: 2, 5, VIP: 3, 6. For A–E) * p < 0.01; +, p < 0.05; n = 7–8 slices per group for each plane. Note that small error bars may be obscured by symbols.