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. Author manuscript; available in PMC: 2011 Aug 25.
Published in final edited form as: Auton Neurosci. 2010 Mar 27;156(1-2):44–50. doi: 10.1016/j.autneu.2010.03.003

Fig. 1.

Fig. 1

Mean (+ SEM) heart rate (Panel A), SDNN index (Panel B), and amplitude of respiratory sinus arrhythmia (Panel C) in paired and isolated prairie voles prior to and during a 10-minute social crowding stressor. Note the scale differences among the three panels. aP < 0.05 vs. respective paired value; bP < 0.05 vs. respective pre-stressor value. SDNN, standard deviation of normal-to-normal intervals; RSA, respiratory sinus arrhythmia.