网络影响决定了皮质合奏对刺激检测的影响
Hayley A Bounds1,2, Hillel Adesnik1,2,3
1Department of Neuroscience, University of California, Berkeley.
bioRxiv : the preprint server for biology
|September 4, 2024
概括
在小鼠中,有针对性的脑细胞激活并没有像预期的那样改善刺激检测. 相反,整体网络活动,而不是特定的神经元组,影响了感知,挑战了当前感官处理理论.
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
- 计算神经科学是一种神经科学.
背景情况:
- 了解神经活动模式如何指导行为至关重要.
- 直接扰乱神经活动是必要的,以因果测试大脑功能的理论.
- 特定神经元组合在刺激检测中的作用仍在争论中.
研究的目的:
- 为了因果调查小鼠视觉皮层中的神经活动如何被用于视觉刺激检测.
- 为了测试高度活跃的神经合奏优先驱动行为的假设.
主要方法:
- 结合两光子成像与细胞分辨率光遗传学光刺激在小鼠.
- 目标激活视觉皮层中的特定和随机神经元组.
- 行为分析和与神经活动解码模型的比较.
主要成果:
- 针对敏感神经元组的有针对性的激活与随机元组相比没有偏好地改变行为.
- 影响神经元组合对感知影响的主要因素是它对整体网络活动的影响.
- 小鼠似乎使用一种简单的总和策略来进行感官检测,而不是加权信息神经元.
结论:
- 挑战了传统的观点,即特定的,信息的神经表征直接驱动知觉.
- 暗示下游大脑区域可能在没有优先权重的情况下总结视觉皮层活动.
- 突出了特定神经干扰对于理解行为的神经基础的重要性.
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