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. Author manuscript; available in PMC: 2012 Aug 1.
Published in final edited form as: Neurobiol Aging. 2009 Sep 24;32(8):1514–1527. doi: 10.1016/j.neurobiolaging.2009.07.017

Figure 3.

Figure 3

6 hour cumulative time spent in W, NR and REM for the first 12 h following ICV infusions of saline, 10 μg and 30 μg of Hcrt-1 at ZT0. * = significantly different for saline, + = late period significantly different from early period for that condition, ▴= young significantly different from old (p < 0.05).