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Title of Journal: J Comp Physiol A

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Abbravation: Journal of Comparative Physiology A

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Springer-Verlag

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DOI

10.1007/bf03288825

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1432-1351

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Different patterns of circadian oscillation in the

Authors: P W Burgoon P T Lindberg M U Gillette
Publish Date: 2004/01/09
Volume: 190, Issue: 2, Pages: 167-171
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Abstract

Although spontaneous neural firing in the mammalian suprachiasmatic nucleus is accepted to peak once during midsubjective day dual activity peaks have been reported in horizontal brain slices taken from hamsters These two peaks were interpreted as new evidence for the theory of dual circadian oscillators and raised the expectation that such activity would be found in other circadian model systems We examined hamster mouse and rat slices in both coronal and horizontal planes and found a second peak of activity only in hamster horizontal preparations This raises interesting questions about the relative circadian physiology of these important experimental animalsThis work was supported by Public Health Service Grants NS22155 NS35859 MUG and NS11134 PWB HL67007 MUG and GM07134 PTL Any opinions findings and conclusions or recommendations expressed in this publication are those of the authors and do not necessarily reflect the views of funding institutions The authors thank Shelley Tischkau and Yanxun Yu who contributed electrophysiological data presented here and David Burgoon who provided statistical consultation All protocols involving the use of animals were approved by the Institutional Animal Care and Use Committee of The University of Illinois and were in conformity with local state and federal regulations for the care and use of laboratory animals


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