The relationship between pulsatile cerebral impedance and heat production in the course of cold exposure in the rat. The role of colonic and ambient temperature

Z. Szelényi, Sz Donhoffer

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Abstract

Pulsatile cerebral impedance (PCI), heart rate (HR), heat production (VO2) and colonic temperature (Tc) were recorded in unanaesthetized, or lightly anaesthetized rats. Percentual changes in the amplitude of PCI (ΔPCI) and HR (ΔHR) in response to tansfer from an ambient temperature (Ta) of 30° to Ta 20°C and 10°C were combined in an index indicating changes in cerebral blood flow (ΔCBF). ΔPCI nad ΔCBF increased with increasing ΔVO2 in rats in which Tc declined in the cold, and decreased with increasing ΔVO2 in animals which maintained Tc or in which Tc increased in the cold.

Original languageEnglish
Pages (from-to)285-291
Number of pages7
JournalActa Physiologica Academiae Scientiarum Hungaricae
Volume50
Issue number3
Publication statusPublished - 1977

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Thermogenesis
Electric Impedance
Cerebrovascular Circulation
Temperature
Heart Rate

ASJC Scopus subject areas

  • Physiology

Cite this

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