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大鼠中物体与位置识别的个体发生:习得与保持效应

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

作者信息

Westbrook Sara R, Brennan Lauren E, Stanton Mark E

机构信息

Department of Psychology, University of Delaware, Newark, Delaware, 19716.

出版信息

Dev Psychobiol. 2014 Nov;56(7):1492-506. doi: 10.1002/dev.21232. Epub 2014 Jul 3.

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.

摘要

新颖物体和位置识别任务利用大鼠探索新奇事物的自然倾向(伯利恩,1950)来研究附带学习。本研究考察了这两项任务的个体发生情况以及出生后第17天至31天之间空间学习的保持情况。实验1表明,出生后第17天、21天和26天的大鼠能够识别新颖物体,但只有出生后第21天和26天的大鼠能够识别熟悉物体的新位置。这些结果表明,新颖物体识别在出生后第17天之前就已发展,而物体位置识别在出生后第17天至21天之间出现。实验2研究了出生后第21天、26天和31天的大鼠物体位置记忆保持的个体发生情况。出生后第26天和31天的大鼠在10分钟和24小时延迟后都能保持物体位置记忆。出生后第21天的大鼠在24小时延迟后未能保持物体位置记忆,这表明在物体位置记忆的个体发生过程中,短期记忆和长期记忆的发展存在差异。

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