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Ablation of suprachiasmatic nucleus alters timing of hibernation in ground squirrels. | LitMetric

Ablation of suprachiasmatic nucleus alters timing of hibernation in ground squirrels.

Proc Natl Acad Sci U S A

Department of Biological Sciences, Stanford University, CA 94305, USA.

Published: September 1996

AI Article Synopsis

Article Abstract

Hibernation patterns were monitored continuously for 2.5 years in female squirrels that were neurologically intact or in which the hypothalamic suprachiasmatic nucleus (SCN) was completely ablated (SCNx). The number of hibernation bouts in SCNx squirrels increased by 159%, total hibernation time increased by 58%, and periodic arousals from hibernation were 47% longer in SCNx than in control squirrels; the duration of individual torpor bouts was 2 days shorter and far more variable in SCNx than in control animals. Some SCNx squirrels cycled through bouts of torpor continuously for nearly 2 years. The SCN appears to be part of the mechanism that controls the duration of the hibernation season and the temporal structure of individual torpor bouts.

Download full-text PDF

Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC38520PMC
http://dx.doi.org/10.1073/pnas.93.18.9864DOI Listing

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