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Company: Thermo Fisher Scientific
Catalog#: 14-649-8
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A Time Duration Discrimination Task for the Study of Elapsed Time Processing in Rats
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2021-03-20
[Abstract]  

Space and time are both essential features of episodic memory. However, while spatial tasks have been used effectively to study the behavioral relevance of place cells, the behavioral paradigms utilized for the study of time cells have not used time duration as a variable that animals need to be aware of to solve the task. In order to evaluate how time flow is coded into memory, time duration needs to be a variable that animals use to solve the behavioral task. This protocol describes a novel behavioral paradigm, the time duration discrimination (TDD) task, which is designed to directly investigate the neurological mechanisms that underlie temporal processing. During the TDD task, rats navigate around a Figure-8 Maze, which contains a rectangular track with a central arm and a delay box

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[摘要]  [摘要]空间和时间都是情节记忆的基本特征。但是,尽管空间任务已被有效地用于研究位置细胞的行为相关性,但用于研究时间细胞的行为范例并未将持续时间用作动物解决任务需要注意的变量。为了评估如何 时间流被编码到内存中,持续时间必须是动物用来解决行为任务的变量。该协议描述了一种新颖的行为范式,即持续时间歧视(TDD)任务,该任务旨在直接研究构成时态处理基础的神经机制。在TDD任务中,老鼠绕着8字形迷宫导航,该迷宫包含一个带有中央臂和中央臂末端的延迟盒的矩形轨道。虽然局限于延迟盒,但是老鼠会经历10或20秒的时间延迟,在此期间,声音会在10或20秒的延迟时间内播放。当延迟框打开,将大鼠会选择是否打开的延迟框的左或右出并接收奖励正确选择(例如,10秒=左转弯; 20秒钟右转)。通过直接操纵经过的时间,我们可以更好地探索海马时间细胞的行为相关性,以及海马神经元生理记录中看到的时间依赖性活动是否反映了时间流的神经元表示形式,动物可以将其用于学习和存储记忆。

图形摘要:

大鼠经过时间持续时间的判别



[背景]情景记忆的形成以时间和空间背景下事件的组织为特征。先前的研究已经确定了在特定位置触发的位置细胞和在体验中顺序触发的时间细胞,从而提供了这种情境化和组织化发生在海马体中的证据(MacDonald等,2011; ...

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