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在获得和保留小鼠视觉感知学习时,侧介质次级视觉皮层的重要作用
Alan Consorti1,2, Gabriele Sansevero1, Irene Di Marco1,2
1Neuroscience Institute, National Research Council (CNR), Pisa, Italy.
Nature communications
|August 25, 2024
概括
视觉感知学习 (vPL) 涉及大脑变化,以改善歧视. 这项研究表明,二级视觉皮层 (LM) 的活动对清醒受试者的vPL获取和保留产生了重大影响.
科学领域:
- 神经科学是一个神经科学.
- 认知科学 认知科学
- 视觉感知 视觉感知 视觉感知
背景情况:
- 感知学习通过实践增强了歧视能力,改善了环境反应.
- 视觉感知学习 (vPL) 传统上与早期视觉处理有关,特别是主要视觉皮层 (V1).
- 假设来自更高视觉区域 (HVA) 的自上而下的输入通过影响注意力和任务期望来调节vPL.
研究的目的:
- 直接评估清醒受试者的自上而下的活动是否可以调节视觉感知学习 (vPL).
- 研究特定大脑区域在获得和保留vPL中的作用.
主要方法:
- 采用化学遗传学来操纵特定大脑区域的神经元活动.
- 进行行为分析以测量歧视能力的变化.
- 利用多通道电生理记录来评估神经活动模式.
主要成果:
- 在vPL中,它在侧介质次级视觉皮层 (LM) 中对神经元活动发挥了关键作用.
- 表明LM活动对于获得 (学习) 和保持vPL至关重要.
- 确定LM作为从上向下反预测的关键来源,用于参与vPL的V1.
结论:
- 来自LM二级视觉皮层的自上而下的反对于视觉感知学习至关重要.
- 这项研究提供了通过影响清醒受试者的高阶视觉区域来调节vPL的直接证据.
- 研究结果强调了反机制在视觉皮层可塑性和学习中的重要性.
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