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竞争的上下文过程依赖于大鼠的下肢和前肢中间前额皮层

David N George¹, Simon Killcross², Josephine E Haddon³

¹School of Psychology and Social Work, University of Hull, Hull HU6 7RX, UK.

Oxford open neuroscience

|April 10, 2024

概括

在大鼠中研究潜伏抑制发现了中间前额叶皮层区域的独特作用. 下边缘皮层和前边缘皮层调节了背景如何影响学习的关联,影响记忆检索.

科学领域:

神经科学是一个神经科学.
行为神经科学行为神经科学
认知神经科学认知神经科学

背景情况:

语境线索显著影响已学会的关联的检索.
中间前额皮层 (mPFC) 区域,特别是下边皮层 (IL) 和前边皮层 (PL),参与调节这些上下文影响.
潜伏抑制是一种协会学习形式,对上下文变化敏感.

研究的目的:

为了研究下边缘皮层和前边缘皮层在潜在抑制的上下文调节中的不同作用.
确定这些mPFC区域如何影响学会协会的背景特异性.

主要方法:

在一个潜在的抑制范式中使用了雄性Lister罩帽老鼠.
刺激在不同的环境中预先暴露,然后在一个环境中进行条件化.
条件化情绪反应 (CER) 在两个环境中对每个刺激进行了评估,并比较了假操作,IL损伤和PL损伤的老鼠.

主要成果:

在暴露前的环境中测试刺激时,用假药操作的老鼠显示了减弱的CER.
受到IL损伤的老鼠失去了上下文特异性,仅在条件化上下文中显示减弱的CER.
患有PL损伤的老鼠仅在非条件化环境中表现出减弱的CER,这表明情境依赖抑制受损.

结论:

在关联性学习的上下文调制中,下边皮层和前边皮层起着相反的作用.
在检索过程中,IL对于特定上下文的抑制至关重要,而PL则参与在不相关的上下文中抑制关联.
这些发现凸显了mPFC分区域对灵活,上下文依赖的记忆的差异性贡献.

关键词:

语境语境语境语境语境阴下边缘皮层的皮层.干扰干扰是干扰的潜在的抑制抑制.在前肢皮层前的皮层.鼠标鼠标鼠标鼠标鼠标

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