Journal
PHYSIOLOGY & BEHAVIOR
Volume 86, Issue 4, Pages 427-433Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.physbeh.2005.07.023
Keywords
circadian rhythms; locomotor activity; spiny mouse; suprachiasmatic nuclei; entrainment; wheel-running activity; Acomys cahirinus
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Circadian locomotor rhythms were examined in adult common spiny mice, Acomys cahirinus. Spiny mice demonstrated nocturnal activity, with onset of activity coinciding promptly with onset of darkness. Re-entrainment to 6-h delays of the light-dark cycle was accomplished faster than to 6-h advances. Access to running wheels yielded significant changes in period and duration of daily activity. Novelty-induced wheel running had no effect on phase of activity rhythms. Circadian responses to light at various times of the circadian cycle were temporally similar to those observed in other nocturnal rodent species. No gender differences were observed in any of the parameters measured. (c) 2005 Elsevier Inc. All rights reserved.
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