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. Author manuscript; available in PMC: 2010 Sep 1.
Published in final edited form as: Early Hum Dev. 2009 Jun 7;85(9):561–567. doi: 10.1016/j.earlhumdev.2009.05.012

Figure 2.

Figure 2

Figure 2

HRV indices across four periods in the KC and IC conditions. KC = Kangaroo Care condition; IC = incubator care condition; LF = low frequency power (predominately sympathetic activity); HF = high frequency power (parasympathetic activity); LF/HF = Low/High frequency power ratio (balance of sympathetic-parasympathetic activity).