Dynamic response of preoptic and hypothalamic neurons to scrotal thermal stimulation in rats

Teruo Nakayama, Kazuyuki Kanosue, Youzou Ishikawa, Kiyoshi Matsumura, Kyoko Imai

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Activities of preoptic and anterior hypothalamic (POAH) neurons were recorded in anesthetized rats in response to serotal thermal stimulation. Thirteen out of 54 neurons responsive to changes of scrotal temperature (Tser) showed dynamic responses. Four of these neurons increased and 3 neurons decreased their firing rates responding dynamically to warming but not to cooling. Six other neurons were inhibited by scrotal cooling only. These dynamic responses were produced even by temperature changes as slow as 2 C/min and only when the scrotum was warmed or cooled in the Tser range above 35° C. These dynamic responses are suggested to be a result of signal processing in supraspinal structures including POAH itself.

Original languageEnglish
Pages (from-to)23-26
Number of pages4
JournalPflügers Archiv European Journal of Physiology
Issue number1
Publication statusPublished - 1983 Jan 1



  • Dynamic response
  • Hypothalamus
  • Preoptic area
  • Scrotal temperature
  • Temperature-sensitive neuron

ASJC Scopus subject areas

  • Physiology
  • Clinical Biochemistry
  • Physiology (medical)

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