视觉皮层中的射击速率显示出代表性漂移,而时间尖峰序列保持稳定
Boris Sotomayor-Gómez1, Francesco P Battaglia2, Martin Vinck1
1Ernst Strüngmann Institute (ESI) for Neuroscience in Cooperation with Max Planck Society, Frankfurt, Germany; Donders Centre for Neuroscience, Department of Neurophysics, Radboud University Nijmegen, Nijmegen, the Netherlands.
Cell reports
|April 9, 2025
概括
神经元组合使用尖峰时间,而不仅仅是射击速度,以获得稳定的感官编码. 神经元之间的相对尖峰时间提供了一个强大的机制,用于大脑的信息处理.
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.
- 系统神经科学 系统神经科学
背景情况:
- 神经对刺激的反应随着时间的推移而变化,这给稳定的大脑编码带来了挑战.
- 现有的模型往往侧重于发射速度,可能会忽视其他神经编码机制.
研究的目的:
- 为了研究尖端定时代码是否比发射率代码提供更稳定的神经表征.
- 在视觉皮层区域比较尖峰率与尖峰时间代码的信息内容和稳定性.
主要方法:
- 利用基于最佳传输理论的新方法SpikeShip,以分析多神经元尖峰序列中的信息.
- 记录了来自六个视觉区域的神经合奏活动,以应对自然视频刺激.
- 由人口发射率向量和相对峰值时间模式传递的量化信息.
主要成果:
- 时间尖峰序列在大型神经元组中传递的信息比人口发射率向量更多.
- 射击速率代码在刺激重复和实验区块之间显示出显著的漂移.
- 尖端定时代码表现出了随着时间的推移而显著的稳定性,与火速表示不同.
结论:
- 神经元之间的相对尖峰定时关系形成了一个稳定的神经代码来传递感官信息.
- 这种尖端定时代码为神经信息处理提供了一个强大的机制,克服了发射速率代码的不稳定性.
- 这些发现突显了高维神经元组合中时间动态对于稳定的大脑功能的重要性.
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