Spinal cord, hypothalamic, and air temperature: Interaction with arousal states in the marmot

Virginia M Miller, F. E. South

Research output: Contribution to journalArticle

Abstract

Yellow-bellied marmots, Marmota flaviventris, prepared with U-shaped thermodes in the epidural space of the thoracic vertebral canal, a thermode in the preoptic hypothalamus, and cortical surface and hippocampal electrodes, were used to investigate the interaction of arousal states with temperature regulation. It was found that arousal state of the animal influences the thermoregulatory responses initiated in either the spinal cord or hypothalamus. Further, changes in ambient temperature affected both the gain and the threshold of these responses. The interaction of the hypothalamus and spinal cord was not an additive function, however the threshold for shivering of each could be altered by temperature manipulation of the other. Future studies in modeling of temperature regulation should consider the contributions of temperature receptors of the spinal cord and the arousal state of the animal during the stimulation period.

Original languageEnglish (US)
JournalAmerican Journal of Physiology - Regulatory Integrative and Comparative Physiology
Volume5
Issue number1
StatePublished - 1979
Externally publishedYes

Fingerprint

Marmota
Arousal
Spinal Cord
Air
Temperature
Hypothalamus
Shivering
Epidural Space
Electrodes
Thorax

ASJC Scopus subject areas

  • Physiology

Cite this

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abstract = "Yellow-bellied marmots, Marmota flaviventris, prepared with U-shaped thermodes in the epidural space of the thoracic vertebral canal, a thermode in the preoptic hypothalamus, and cortical surface and hippocampal electrodes, were used to investigate the interaction of arousal states with temperature regulation. It was found that arousal state of the animal influences the thermoregulatory responses initiated in either the spinal cord or hypothalamus. Further, changes in ambient temperature affected both the gain and the threshold of these responses. The interaction of the hypothalamus and spinal cord was not an additive function, however the threshold for shivering of each could be altered by temperature manipulation of the other. Future studies in modeling of temperature regulation should consider the contributions of temperature receptors of the spinal cord and the arousal state of the animal during the stimulation period.",
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