感知表现和V1神经活动对皮层增益的微小变化非常敏感
bioRxiv : the preprint server for biology
|March 11, 2026
概括
乙胆可以增强灵长类动物视觉皮层中的神经增益 (V1). 在4C层激活尼古丁受体会在V1层之间产生广泛的,异质的增益效应,影响感知.
科学领域:
- 神经科学是一个神经科学.
- 系统神经科学 系统神经科学
- 视觉神经科学是一种神经科学.
背景情况:
- 神经调节剂通过不完全理解的机制显著影响神经电路功能.
- 灵长类动物的初级视觉皮层 (V1) 是研究皮层电路的一个很好的特征模型.
- 乙胆在V1中的作用特别感兴趣,这是由于基础前脑内化和特定的尼古丁受体表达在thalamocortical轴突上.
研究的目的:
- 为了研究乙胆介导的增益变化在V1层超出4C层的传播和影响.
- 为了确定这些效应的幅度和方向 (增强或抑制).
- 了解这些增益变化如何影响在感知任务期间的神经处理.
主要方法:
- 尼古丁的选择性局部输送到雷猿V1.1的4C层V1.1.
- 在整个皮层深度记录神经活动.
- 使用适应的正常化模型来预测增益效应.
- 在感知任务期间评估效应.
主要成果:
- 在V1层中观察到广泛和异质的增益效应.
- 这些效应独立于视觉刺激条件.
- 一个适应的正常化模型准确地预测了观察到的增益变化.
- 收益变化在感知任务执行期间持续存在,并没有被电路补偿.
结论:
- 在V1层4C中尼古丁受体的激活会在皮层层中诱导显著的,广泛的增益调节.
- 这些效应是层特定的,可以通过规范化模型进行预测.
- 观察到的增益变化直接影响神经处理和感知任务的性能.
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