title: Heart Rate Variability in Nonlinear Rats with Different Orientation and Exploratory Activity in the Open Field.
abstract: The basic behavioral activity of nonlinear rats was evaluated from the sum of crossed peripheral and central squares and peripheral and central rearing postures in the open fi eld test. This index was low (<20 episodes), intermediate (20-29 episodes), or high (>30 episodes). Male rats with high score of orientation and exploratory activity were characterized by higher indexes of total heart rate variability than rats with low or intermediate activity. Specimens with a greater contribution of VLF waves into the total power spectrum of heart rate variability were shown to dominate among the rats with high behavioral activity. Our results are consistent with the notions of a suprasegmental nature of VLF waves.
authors.affiliation: Department for Physiology and Morphology of Human Being and Animals, Astrakhan State University, Astrakhan, Russia. fyzek@rambler.ru.
authors.forename: E V
authors.initials: EV
authors.lastname: Kur'yanova
authors.affiliation: Department for Physiology and Morphology of Human Being and Animals, Astrakhan State University, Astrakhan, Russia.
authors.forename: D L
authors.initials: DL
authors.lastname: Teplyi
authors.affiliation: Department for Physiology and Morphology of Human Being and Animals, Astrakhan State University, Astrakhan, Russia.
authors.forename: Yu D
authors.initials: YD
authors.lastname: Zhukova
authors.affiliation: Department for Physiology and Morphology of Human Being and Animals, Astrakhan State University, Astrakhan, Russia.
authors.forename: N V
authors.initials: NV
authors.lastname: Zhukovina
mesh_terms: D000818:Animals; D004562:Electrocardiography; D005106:Exploratory Behavior / Q000187:drug effects; D006339:Heart Rate / Q000502:physiology*; D008297:Male; D009949:Orientation / Q000187:drug effects; D051381:Rats
keywords: behavioral types; heart rate variability; open fi eld test; orientation and exploratory activity; spectral analysis; types of heart rate variability