Slight warming of the spinal cord and the hypothalamus in the pigeon: effects on thermoregulation and sleep during the night

Rudolf Graf, H. Graig Heller, Scott Sakaguchi

Research output: Contribution to journalArticle

5 Scopus citations

Abstract

1. 1.|Pegions were chronically implanted with thermodes and thermocouple re-entrant tubes both in the vertebral canal and in the anterior hypothalamus. Arousal states were determined using EEG-, EOG- and EMG-electrodes, and the metabolic rate by measuring O2 consumption. 2. 2.|During darkness (D), slight warming of the hypothalamus to a temperature level characteristic of light (L) had little or no effect. 3. 3.|Warming the spinal cord to the L-level resulted in a dramatic decrease of the metabolic rate and the extraspinal body temperature. Moreover, warming the spinal cord increased the amount of slow-wave sleep and highly reduced paradoxical sleep. 4. 4.|Our results support the idea of an interdependence between thermal state and arousal state.

Original languageEnglish (US)
Pages (from-to)159-161
Number of pages3
JournalJournal of Thermal Biology
Volume8
Issue number1-2
DOIs
StatePublished - Jan 1983

Keywords

  • Columbia livia
  • Pigeon
  • diurnal rhythm
  • hypothalamic thermosensitivity
  • sleep
  • spinal thermosensitivity

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