截然不同的前皮层组合编码响应执行和抑制
Rajtarun Madangopal1, Yuan Zhao2, Conor Heins1
1Behavioral Neuroscience Research Branch, Intramural Research Program, National Institute on Drug Abuse, Baltimore, MD 21224.
前极皮层 (PL) 用不同的神经元组合来执行和抑制动作. 这项研究表明,特定的PL合奏被招募用于学习行动和学习停止,从而实现行为灵活性.
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
背景情况:
- 前皮质 (PL) 对于适应性行为至关重要,它将过去的经验与新信息相结合.
- 一个稳定的PL神经元群体 (ensemble) 被招募用于操作奖励学习和响应执行.
研究的目的:
- 研究PL神经元组合如何适应不断变化的奖励突发事件,特别是在灭绝 (奖励遗漏) 期间.
- 为了确定相同的PL集团是否适应行为抑制,或者是否招募不同的集团进行灭绝学习.
主要方法:
- 在操作条件 (训练),灭绝和恢复阶段,在老鼠中进行纵向单细胞成像.
- 在PL活动模式上培训解码器,以预测试验明智的反应.
- 使用in silico删除方法来识别用于响应执行和抑制的独特PL集.
主要成果:
- 操作式灭绝学习招募了一个独特的PL Extinction组合用于响应抑制.
- 训练和灭绝组合的协同参与编码了特定上下文的行为.
- 两支乐团都重新投入工作,并在恢复期间保持各自的角色.
结论:
- 前极皮层使用不同的神经元组合来对抗学习的关联 (动作执行与抑制).
- 这些合奏的选择性招募使行为灵活性能够应对不断变化的环境突发事件.
- 这突出了基于集合的神经编码,用于在同一大脑区域内多个甚至相互冲突的学习行为.
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