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. Author manuscript; available in PMC: 2008 Jun 12.
Published in final edited form as: Physiol Behav. 2006 Sep 22;90(1):11–20. doi: 10.1016/j.physbeh.2006.08.013

Fig. 8.

Fig. 8

Phase differences between parameters are evaluated by comparing peak offsets of cross-correlations. Phase differences do not appear to differ systematically between photoentrained (abscissa) and free-running constant light conditions (ordinate). Lack of a systematic difference is consistent with the hypothesis that the three parameters, amplitude, tauP2, and rate, are driven by common or coupled oscillators.