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. Author manuscript; available in PMC: 2010 Jun 1.
Published in final edited form as: J Biol Rhythms. 2009 Dec;24(6):497–508. doi: 10.1177/0748730409349059

Figure 2.

Figure 2

Wheelrunning suppression varies with the number of flashes and also depends on the IFI. (A) Expt. 1: As the number of flashes delivered over a 5 min interval increases from 1 to 5, there is little change in the extent of wheelrunning suppression. Response jumps to maximal following 10 flashes per 5 min, suggesting a step function. All individuals responded to 10 flashes. (B) Expt. 2: Wheelrunning suppresion was more effectively achieved with 4-5 flashes presented with the IFI fixed at 16 sec. The difference between the Expts. 1 and 2 was that the IFI varied inversely with the number of flashes in the first, but remained fixed at 16 sec for the second. The solid lines indicate eye-estimated curves fitted to the data. The two experiments were conducted and analyzed independently. Groups sharing letter (Expt. 1) or number (Expt. 2) identifiers did not differ (p>.05). The groups receiving zero flashes experienced all sounds associated with delivery of 10 flashes, but no light.