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. Author manuscript; available in PMC: 2006 Nov 9.
Published in final edited form as: Neurobiol Aging. 2006 Nov 28;29(3):471–477. doi: 10.1016/j.neurobiolaging.2006.10.018

Figure 1.

Figure 1

Resynchronization of SCN and liver Per1-luc rhythms after phase-shifts A. Phase shift schedules. Asterisks indicate the times at which cultures were prepared for Per1-luc measurements. B. Typical examples of bioluminescence recordings from liver cultures prepared either before the shift, or on the first or 6th day following a phase-delay. The arrows indicate the peaks used as phase markers for subsequent analysis of rhythm phase. C. Peak-phases of SCN and liver cultures during resynchronization in young and aged rats. The phases from unshifted rats were normalized to 0, and subsequent phase measurements plotted relative to those baselines. The vertical dotted lines indicate the target phases that the tissues are moving towards. Students t-test; *p<0.05 relative to young controls.