{{'Search' | translate}}
 

Ethanol 70%

Company: Thermo Fisher Scientific Scientific
Catalog#: 04-355-223
Bio-protocol()
Company-protocol()
Other protocol()

Delayed Alternation Task for the Study of Spatial Working and Long Term Memory in Rats
Author:
Date:
2020-03-05
[Abstract]  Memory systems can hold previously presented information for several seconds, bridging gaps between discontinuous events. It has been previously demonstrated that the hippocampus and the medial entorhinal cortex (mEC) are necessary for memory retention over delay intervals in alternation tasks. Here we describe the delayed alternation task, a spatial working memory (WM) task in which animals need to alternate between left and right sides of a figure-8 maze on a trial-by-trial basis to receive a reward. On each trial of this task, the rat has to remember the last episode and turn in the opposite direction compared to the previous trial. We manipulated the WM load by introducing delays of various lengths (10 s and 60 s) between trials. While other alternation task protocols use short delay ... [摘要]  [摘要] 内存系统可以将先前显示的信息保留几秒钟,以弥合离散事件之间的差距。先前已经证明海马和内侧内嗅皮层(mEC)对于交替任务中延迟间隔的记忆保持是必需的。在这里,我们描述了延迟的交替任务,这是一种空间工作记忆(WM)任务,在该任务中,动物需要在逐个试验的基础上,在图8迷宫的左右两侧之间进行交替才能获得奖励。在执行此任务的每次试验中,大鼠都必须记住最后一集,并与先前的试验相比要朝相反的方向转动。我们通过在两次试验之间引入各种长度(10 s和60 s)的延迟来控制WM负载。而其他交替任务协议使用试验之间短的延迟时间间隔,我们的协议引入了要求动物使用的不一定是连续的神经元放电模式(支持长期记忆资源,较长的延迟情况,即,时间细胞)被认为与短延迟间隔。

[背景] 海马和内嗅皮层的主要功能是连接由延迟间隔分隔的事件(Eichenbaum,2017; Robinson 等,2017; Ainge 等,2007; Sabariego 等,2019)。有人提出,对于这些事件的记忆保留是通过在时间结构化体验中的连续时刻触发的细胞来实现的,这些细胞被称为时间细胞(Eichenbaum,2017)。然而,尽管大多数研究使用间隔时间不超过15秒的交替任务协议(Ainge 等人,2007; Ito 等人,2015; Pastalkova ...

Comments