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. Author manuscript; available in PMC: 2009 Dec 30.
Published in final edited form as: Brain Res. 2008 Sep 24;1246:96–100. doi: 10.1016/j.brainres.2008.09.040

Figure 2.

Figure 2

Delayed phase angle of entrainment. Phase angles of entrainment was recorded over 5 one-week periods selected at 3-5 week intervals throughout the experiment, and the mean (± S.E.M.) was used to compare between two groups. In the final week (134-141 days) of the experiment, the npy-/- mice showed a significantly delayed onset of activity compared to WT mice (the difference of phase angle of entrainment between start point and end point of the treatment WT -15.4 min vs. npy-/- mice -42.9 min; t(17) = -2.11, P < 0.05). Groups did not significantly differ before this time point.