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. Author manuscript; available in PMC: 2008 Feb 28.
Published in final edited form as: Physiol Behav. 2006 Nov 14;90(2-3):386–393. doi: 10.1016/j.physbeh.2006.09.037

Figure 1.

Figure 1

Mean (± SEM) heart rate (Panel A) and spontaneous activity (Panel B) in prairie voles during one undisturbed 24-hour period. The light period is demarcated with dotted lines.