对于大鼠的计时表现,需要介面前皮层和中背丘脑之间的通信
Benjamin J De Corte1, Kelsey A Heslin2, Nathan S Cremers2
1Department of Psychiatry, Columbia University, New York, NY, USA; Division of Developmental Neuroscience, New York State Psychiatric Institute, New York, NY, USA.
Neurobiology of learning and memory
|February 7, 2026
概括
这项研究揭示了中脊柱体 (MD) 和前额叶皮层 (PFC) 之间的通信对于准确的时间预测至关重要. 破坏这种途径会损害时间行为,为认知功能和相关疾病提供新的见解.
科学领域:
- 神经科学是一个神经科学.
- 认知科学 认知科学
背景情况:
- 准确预测未来事件对于适应性行为至关重要.
- 前额叶皮层 (PFC) 和它的动物同类,前皮层 (PL),都与时间和预期性决策有关.
- thalamus (MD) 的中脊核与 PFC 有密切的相互连接,并参与高阶认知,但其在时间方面的作用不太了解.
研究的目的:
- 为了研究体中脊核 (MD) 的因果作用及其与前额叶皮层 (PFC) 在间隔时间行为中的沟通.
- 确定MD-PFC相互作用是否对于准确的时间预测和决策是必要的.
主要方法:
- 19只雄性长埃文斯大鼠接受了双间隔计时任务的训练.
- 使用GABA-A受体激动剂muscimol进行了MD和/或PL的可逆失活.
- 用行为分析,包括单项试验评估,来评估时间缺陷.
主要成果:
- MD或PL的失活,或MD-PFC通信的中断,导致反应曲线平坦,表明时间受损.
- 整体响应率没有受到操纵的影响.
- 单一试验分析显示了行为时间结构的根本性崩,而不仅仅是响应爆发的扩大.
结论:
- 这些发现提供了第一个因果关系证据,即MD-PFC通信是特别需要的间隔时间.
- 这项研究涉及到MD和PL的时间,并强调MD-PFC相互作用对更高阶认知功能的重要性.
- 确定的MD-PFC途径对理解神经精神疾病如精神分裂症和帕金森病的时间缺陷有重大影响.
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