The Lateral Habenula as a Relay of Cortical Information to Process Working Memory

The Lateral Habenula as a Relay of Cortical Information to Process Working Memory
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外侧缰核作为皮质信息处理工作记忆的中继

DOI:
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发表时间:
2016
期刊:
影响因子:
3.7
通讯作者:
L. Lecourtier
L. Lecourtier
中科院分区:
医学2区
文献类型:
--
作者:
Victor P Mathis;A. Barbelivien;M. Majchrzak;C. Mathis;J. Cassel;L. Lecourtier

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摘要 工作记忆是一种认知能力,允许临时存储信息以解决问题或调整行为。虽然已知工作记忆主要依赖于内侧前额叶皮层 (mPFC),但人们对皮层信息如何在皮层下传递的了解甚少。通过其连接性,外侧缰核(lHb)可能充当皮质信息的皮质下中继。事实上,lHb 接收来自 mPFC 多个子区域的输入,最近的研究结果表明,lHb 在空间信息在线处理中发挥着重要作用,空间信息是工作记忆的一个基本方面。在大鼠中,在延迟非匹配位置范式中,使用 GABAA 激动剂蝇蕈醇的局灶显微注射,我们发现 lHb 失活(每侧 0.2 µL 中 16 ng),以及 mPFC 前边缘区域之间的断开(mPFC/PrL,一个半球 0.4 µL 中 32 ng) lHb(对侧半球的 lHb 中 0.2 µL 为 16 ng)会损害工作记忆。这些缺陷不太可能是由动机或运动缺陷引起的,因为蝇蕈醇不会影响奖励收集或提示反应潜伏期,并且不会增加遗漏的数量。这些结果首次显示了 lHb 在 mPFC 依赖性记忆过程中的含义,可能是 mPFC/PrL 信息的中继。它们还为理解高级认知功能的自上而下的处理开辟了新的视角。
Abstract Working memory is a cognitive ability allowing the temporary storage of information to solve problems or adjust behavior. While working memory is known to mainly depend on the medial prefrontal cortex (mPFC), very few is known about how cortical information are relayed subcortically. By its connectivity, the lateral habenula (lHb) might act as a subcortical relay for cortical information. Indeed, the lHb receives inputs from several mPFC subregions, and recent findings suggest a role for the lHb in online processing of spatial information, a fundamental aspect of working memory. In rats, in a delayed non‐matching to position paradigm, using focal microinjections of the GABAA agonist muscimol we showed that inactivation of the lHb (16 ng in 0.2 &mgr;L per side), as well as disconnection between the prelimbic region of the mPFC (mPFC/PrL, 32 ng in 0.4 &mgr;L in one hemisphere) and the lHb (16 ng in 0.2 &mgr;L in the lHb in the contralateral hemisphere) impaired working memory. The deficits were unlikely to result from motivational or motor deficits as muscimol did not affect reward collection or cue responding latencies, and did not increase the number of omissions. These results show for the first time the implication of the lHb in mPFC‐dependent memory processes, likely as a relay of mPFC/PrL information. They also open new perspectives in the understanding of the top‐down processing of high‐level cognitive functions.
前额叶皮层和海马体促进大鼠工作记忆的不同组成部分。
DOI: 10.1101/lm.850808
发表时间: 2008
期刊: Learning & memory (Cold Spring Harbor, N.Y.)
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