Circadian rhythm of body temperature persists after suprachiasmatic lesions in the squirrel monkey

C. A. Fuller, Ralph Lydic, F. M. Sulzman

Research output: Contribution to journalArticle

86 Citations (Scopus)

Abstract

Squirrel monkeys (Saimiri sciureus) demonstrate prominent circadian (approx 24 h) rhythms in many behavioral and physiological variables including drinking and body temperature. Both of these rhythms can be entrained by a 24-hr light-dark cycle (LD 12:12) but will free-run with an endogenous period in a constantly illuminated (LL:600 lx) environment free of time cues. After radio-frequency lesions were placed stereotaxically in the suprachiasmatic nuclei (SCN) of five monkeys, the circadian rhythm of drinking behavior was disrupted when the monkeys were maintained in LL. However, the circadian rhythm in core body temperature in these animals persisted in LL with a significant circadian spectral component following destruction of the SCN. The SCN thus appear to be of fundamental importance for regulating the circadian organization of drinking; however, an oscillator located elsewhere in the squirrel monkey is capable of generating the core body temperature rhythm.

Original languageEnglish (US)
Pages (from-to)385-391
Number of pages7
JournalAmerican Journal of Physiology - Regulatory Integrative and Comparative Physiology
Volume10
Issue number3
StatePublished - Jan 1 1981
Externally publishedYes

Fingerprint

Saimiri
Suprachiasmatic Nucleus
Circadian Rhythm
Body Temperature
Drinking
Haplorhini
Drinking Behavior
Personal Autonomy
Photoperiod
Radio
Cues

All Science Journal Classification (ASJC) codes

  • Physiology
  • Physiology (medical)

Cite this

Circadian rhythm of body temperature persists after suprachiasmatic lesions in the squirrel monkey. / Fuller, C. A.; Lydic, Ralph; Sulzman, F. M.

In: American Journal of Physiology - Regulatory Integrative and Comparative Physiology, Vol. 10, No. 3, 01.01.1981, p. 385-391.

Research output: Contribution to journalArticle

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