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Ontogeny of object versus location recognition in the rat: Acquisition and retention effects

Ontogeny of object versus location recognition in the rat: Acquisition and retention effects ABSTRACT Novel object and location recognition tasks harness the rat's natural tendency to explore novelty (Berlyne, 1950) to study incidental learning. The present study examined the ontogenetic profile of these two tasks and retention of spatial learning between postnatal day (PD) 17 and 31. Experiment 1 showed that rats ages PD17, 21, and 26 recognize novel objects, but only PD21 and PD26 rats recognize a novel location of a familiar object. These results suggest that novel object recognition develops before PD17, while object location recognition emerges between PD17 and PD21. Experiment 2 studied the ontogenetic profile of object location memory retention in PD21, 26, and 31 rats. PD26 and PD31 rats retained the object location memory for both 10‐min and 24‐hr delays. PD21 rats failed to retain the object location memory for the 24‐hr delay, suggesting differential development of short‐ versus long‐term memory in the ontogeny of object location memory. © 2014 Wiley Periodicals, Inc. Dev Psychobiol 56: 1492–1506, 2014. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Developmental Psychobiology Wiley

Ontogeny of object versus location recognition in the rat: Acquisition and retention effects

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References (50)

Publisher
Wiley
Copyright
"© 2014 Wiley Periodicals, Inc."
ISSN
0012-1630
eISSN
1098-2302
DOI
10.1002/dev.21232
pmid
24992011
Publisher site
See Article on Publisher Site

Abstract

ABSTRACT Novel object and location recognition tasks harness the rat's natural tendency to explore novelty (Berlyne, 1950) to study incidental learning. The present study examined the ontogenetic profile of these two tasks and retention of spatial learning between postnatal day (PD) 17 and 31. Experiment 1 showed that rats ages PD17, 21, and 26 recognize novel objects, but only PD21 and PD26 rats recognize a novel location of a familiar object. These results suggest that novel object recognition develops before PD17, while object location recognition emerges between PD17 and PD21. Experiment 2 studied the ontogenetic profile of object location memory retention in PD21, 26, and 31 rats. PD26 and PD31 rats retained the object location memory for both 10‐min and 24‐hr delays. PD21 rats failed to retain the object location memory for the 24‐hr delay, suggesting differential development of short‐ versus long‐term memory in the ontogeny of object location memory. © 2014 Wiley Periodicals, Inc. Dev Psychobiol 56: 1492–1506, 2014.

Journal

Developmental PsychobiologyWiley

Published: Nov 1, 2014

Keywords: ; ; ; ; ;

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