PMID: 9438884Aug 1, 1997Paper

Olfactory bulbectomy impedes social but not photic reentrainment of circadian rhythms in female Octodon degus

Journal of Biological Rhythms
N Goel, T M Lee

Abstract

Recent studies demonstrated that nonphotic (social) cues markedly accelerate reentrainment to large phase shifts of the light-dark (LD) cycles in female Octodon degus and that such changes are likely effected by chemosensory stimuli. This experiment investigated the effects of olfactory bulbectomies on (1) socially facilitated reentrainment rates of circadian rhythms following a 6-h phase advance of the LD cycle, (2) photic reentrainment rates of circadian rhythms following a 6-h advance of the LD cycle, (3) photic entrainment, and (4) the circadian period (tau) of activity rhythms in constant darkness (DD). olfactory bulbectomies (BX) blocked socially facilitated reentrainment rates but did not alter reentrainment rates of circadian rhythms to photic cues alone. In addition, BX lowered mean daily locomotor activity levels and decreased the amplitude of the activity rhythm in degus housed in entrained (LD 12:12) conditions but did not alter the phase of activity onset or offset, duration (alpha) of activity, or mean daily core body temperature. Bulbectomies also failed to modify tau of free-running activity rhythms. This experiment confirms that the olfactory bulbs and chemosensory cues are necessary for socially facilitated re...Continue Reading

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Citations

Dec 10, 2003·Current Opinion in Neurobiology·Alec J Davidson, Michael Menaker
May 1, 1999·Physiology & Behavior·S M Rajaratnam, J R Redman
Jan 31, 2004·ILAR Journal·Theresa M Lee
Dec 3, 2014·Physiology & Behavior·Yuri RobbersJohanna H Meijer
May 1, 2015·The Anatomical Record : Advances in Integrative Anatomy and Evolutionary Biology·Jacek KuchinkaAleksander Szczurkowski
Jul 6, 2016·Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology·Katharina BeerCharlotte Helfrich-Förster
Sep 30, 2010·Journal of Biological Rhythms·Guy Bloch
May 31, 2001·Chronobiology International·S S CampbellA G Suhner
Jan 14, 2021·Chronobiology International·Pratishtha Sonker, Muniyandi Singaravel
Apr 8, 2021·Chronobiology International·Clifford E Harpole, Vincent M Cassone
Oct 28, 2011·The Journal of Experimental Biology·Shahnaz Rahman Lone, Vijay Kumar Sharma
Aug 24, 2021·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Oliver SiehlerGuy Bloch

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