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The Behavior of the Laboratory RatA Handbook with Tests$
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Ian Q. Whishaw and Bryan Kolb

Print publication date: 2004

Print ISBN-13: 9780195162851

Published to Oxford Scholarship Online: May 2009

DOI: 10.1093/acprof:oso/9780195162851.001.0001

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PRINTED FROM OXFORD SCHOLARSHIP ONLINE (oxford.universitypressscholarship.com). (c) Copyright Oxford University Press, 2021. All Rights Reserved. An individual user may print out a PDF of a single chapter of a monograph in OSO for personal use. date: 16 October 2021

Object Recognition

Object Recognition

(p.383) 36 Object Recognition
The Behavior of the Laboratory Rat

Dave G. Mumby

Oxford University Press

This chapter discusses object recognition in rats. It describes the two paradigms most often used to assess object recognition in rats: delayed nonmatching-to-sample (DNMS) and novel-object-preference (NOP). It shows that despite superficial similarities, DNMS and NOP tests engage different behavioral and motivational systems and therefore entail different procedural pitfalls and interpretational challenges. Still, findings from lesion experiments using either task have so far been fairly consistent, suggesting that the hippocampus is not critical for object-recognition memory, whereas the perirhinal cortex plays a more significant role. These conclusions are consistent with findings of changes in single-unit responses and c-fos expression within the perirhinal cortex produced by repeatedly presented visual stimuli.

Keywords:   laboratory rats, object recognition paradigms, nonmatching-to-sample, novel-object-preference, lesion experiments

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