特定特征的抑制连接性增加了皮质表示的准确性
Mora B Ogando1,2, Lamiae Abdeladim1,2, Kevin K Sit1,2
1Department of Neuroscience, University of California, Berkeley.
bioRxiv : the preprint server for biology
|August 6, 2025
概括
皮层电路可以完成或取消可预测的神经活动来解释感官信息. 这项研究揭示了小鼠视觉皮层中的金字塔细胞和体静止素内神经元如何实现这些对立的计算,以增强推断.
科学领域:
- 神经科学是一个神经科学.
- 计算神经科学是一种神经科学.
- 感官处理 感官处理
背景情况:
- 动物通过推断缺少的信息和抑制模糊性来解释复杂的感官场景.
- 皮层微电路被假设通过完成或取消可预测的神经活动来贡献.
- 目前尚不清楚单个电路是否可以执行这些对立计算.
研究的目的:
- 研究皮质电路如何实现用于感官推理的互补计算.
- 确定金字塔细胞 (PC) 和体静态内神经元 (SST) 实现完成和取消的机制.
- 探索特定连接模式在这些过程中的作用.
主要方法:
- 在小鼠初级视觉皮层 (V1) 的全光学生理学 (V1).
- 在PC和SST中模拟感官唤起的活动模式.
- 对定向调节的细胞组合进行光刺激.
主要成果:
- 基于单元号的PC合集显示了基于单元号完成或取消表示的双重能力.
- 一个"相似"的PC-PC刺激动机支持完成.
- 一个新的"相似"的SST-PC连接模式通过抑制类似调的PC来调节取消.
- 在视觉处理过程中SST组合激活通过抑制模两可的活动来增强输入可区分性.
结论:
- 互补的,特征特定的连接模式可以实现不同的上下文调制策略.
- 电脑-电脑交互方便完成,而PC-SST-PC循环可以取消.
- 这些机制通过动态调整输入结构和网络状态来优化推断.
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