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. Author manuscript; available in PMC: 2015 May 28.
Published in final edited form as: Physiol Behav. 2014 Apr 13;131:7–16. doi: 10.1016/j.physbeh.2014.04.006

Fig. 2.

Fig. 2

Effects of novel wheel exposure at ZT 5 on proestrus on phase shifts in activity rhythms. Open circles depict the phase shifts in individual animals; bars represent mean + S.E.M. and numbers within bars indicate sample size. Phase advances did not differ among hamsters exposed to locked or unlocked wheels, regardless of whether the LH surge occurred on Day 1 (D1) or 2 (D2) (P=0.28).