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Lack of SST enhances photoperiodic modulation of circadian waveform. (A) Representative double-plotted wheel-running actograms from male mice of each group. Lighting conditions are illustrated with white:black bars and internal shading. (B) Photoperiodic modulation of circadian waveform during entrainment. (C) Photoperiodic modulation of daily siesta time during entrainment. *post hoc comparisons, P < 0.05.
