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The ontogeny of heart period patterning in the rat
Author(s) -
Larson Sandra K.,
Porges Stephen W.
Publication year - 1982
Publication title -
developmental psychobiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.055
H-Index - 93
eISSN - 1098-2302
pISSN - 0012-1630
DOI - 10.1002/dev.420150604
Subject(s) - ontogeny , period (music) , vagal tone , heart development , tonic (physiology) , respiration , heart rate , cardiovascular physiology , respiratory system , biology , medicine , physiology , autonomic nervous system , anatomy , blood pressure , biochemistry , physics , embryonic stem cell , acoustics , gene
Heart period, heart period variability, and respiration frequency were observed and compared longitudinally in rats from birth to 24 days of age. In addition, V , a quantification of respiratory sinus arrhythmia derived via spectral analysis of the heart period pattern, was observed. It was hypothesized that these heart period parameters would be differentially sensitive to the neural control of the heart and would, therefore, reflect different developmental patterns. Heart period and heart period variability indicated developmental patterns consistent with the literature. The ontogeny of V suggests that it may represent the developmental pattern of tonic vagal influences on the heart.