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Effect of chronic ethanol feeding (5% w/v) or isocaloric control diet on the spectral density of interbeat intervals (IBI) in the low-frequency (IBI-LFnu, 0.25–0.75 Hz, panel A), and high-frequency (IBI-HFnu, 0.75–3 Hz; panel B) ranges as well as on the LF/HF ratio of IBI (panel C) in telemetered female Sprague-Dawley rats. Values are weekly means S.E.M of 6–7 observations. *P<0.05 versus corresponding time-course control values.
