Spatial memory in rats after 25 hours.

Spatial memory in rats after 25 hours.
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DOI:
10.1016/j.lmot.2008.03.002
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发表时间:
2008-11
影响因子:
1.4
通讯作者:
Babb, Stephanie J.
Babb, Stephanie J.
中科院分区:
心理学4区
文献类型:
--
作者:
Crystal, Jonathon D.;Babb, Stephanie J.

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我们使用八臂径向迷宫研究了大鼠空间记忆衰退的时间过程。已经确定的是,保持时间间隔长达4小时的性能仍然很高,但随着24小时的保持时间间隔(例如,)下降到偶然。24小时可能反映了大鼠空间记忆的真正保留限制。或者,即使在非常长的延迟之后,也可以识别可能支持存储器性能的因素。本实验旨在验证上述两个假设。我们使用两个试验间隔(24和48小时)和两个保留间隔(1和25小时)评估性能。增加试验间隔产生了一个近似恒定的增加性能的两个保留间隔。这种改进与试验间隔效应(即,间隔试验优于集中试验)。大鼠的空间记忆至少持续25小时。
We investigated the time course of spatial-memory decay in rats using an eight-arm radial maze. It is well established that performance remains high with retention intervals as long as 4 hr, but declines to chance with a 24-hr retention interval (e.g.,). It is possible that 24 hr reflects a genuine retention limitation of rat spatial memory. Alternatively, it may be possible to identify factors that might support memory performance even after very long delays. The current experiment was conducted to test the above two hypotheses. We evaluated performance using two intertrial intervals (24 and 48 hr) and two retention intervals (1 and 25 hr). Increasing the intertrial interval produced an approximately constant increase in performance for both retention intervals. This improvement is consistent with a trial-spacing effect (i.e., the superiority of spaced over massed trials). Rat spatial memory apparently lasts at least 25 hr.
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