获取后的诺亚上腺激活会损害随后的记忆,这取决于皮层-海马体的重新激活
Hendrik Heinbockel1, Gregor Leicht2, Anthony D Wagner3
1Department of Cognitive Psychology, University of Hamburg, Hamburg, Germany.
eLife
|January 29, 2025
概括
在回忆回忆后的压力可能会损害未来的回忆. 诺拉丁激素刺激,但不是葡萄糖皮质类药物,通过影响提取期间的海马和皮质信号,对记忆巩固产生负面影响,从而改变未来的记忆可访问性.
科学领域:
- 神经科学是一个神经科学.
- 认知心理学 认知心理学
- 心理药理学 心理药理学
背景情况:
- 巩固的记忆可以在检索时变得不稳定,容易受到压力等后续事件的调节.
- 控制记忆巩固的精确神经机制和回忆后刺激的影响仍然不完全理解.
研究的目的:
- 为了研究记忆检索后的诺亚上腺和葡萄糖皮质激素活性对随后的记忆回忆的影响.
- 确定神经相关物,特别是海马和皮质活动,与记忆的后检索调制相关.
主要方法:
- 这是一项为期三天的研究,涉及初始记忆编码,24小时延迟记忆提示和最终回忆.
- 功能磁共振成像 (fMRI) 用于测量这些阶段的大脑活动.
- 药理干预措施在恢复后进行,以提高noradrenergic或葡萄糖皮质激素水平.
主要成果:
- 恢复后的葡萄糖皮质激素给药没有显著改变随后的记忆回忆.
- 恢复后的诺亚激素兴奋导致最终回忆受损,这取决于海马体的激活和在提示期间的腹腔时皮层类别级别的恢复.
- 这些对记忆的调节效应不需要重新激活原始记忆痕迹,也不需要与离线休息相关的恢复相互作用.
结论:
- 记忆检索后的诺拉丁激发可以破坏未来的记忆可访问性.
- 诺拉丁激素刺激的影响取决于在检索过程中发生的特定神经反应模式 (海马和皮质).
- 这些发现阐明了一种机制,即急性压力通过noradrenergic途径可以动态地改变巩固记忆的稳定性和未来回忆.
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