在人类头顶皮层中,先验和决策的表现
Tom R Marshall1,2, Maria Ruesseler3, Laurence T Hunt3
1Centre for Human Brain Health, School of Psychology, University of Birmingham, Birmingham, United Kingdom.
PLoS biology
|January 29, 2024
概括
这项研究揭示了人类头顶皮层中指导眼睛运动的两个不同的大脑过程. 一种快速频率标记方法确定了先前信息如何影响感官输入收益,而与事件相关的领域显示了决策的神经发射率.
科学领域:
- 神经科学是一个神经科学.
- 认知科学 认知科学
- 计算神经科学是一种神经科学.
背景情况:
- 动物使用导向行为,如眼动,来探索环境.
- 萨卡德目标选择依赖于即时的感官证据和随着时间的推移而建立的累积"值地图".
- 执行交叉顺序前置的神经机制,无论是通过发射速度还是通过突触修饰,仍然不清楚.
研究的目的:
- 为了研究当前的萨卡德选择的基础上的独特的神经过程,以及在人类皮层皮层中交叉萨卡德先验的表现.
- 区分神经发射速率和活动静音机制,在执行合选择和事先信息时.
主要方法:
- 磁脑电图 (MEG) 用于记录人类参与者的大脑活动.
- 与事件相关的字段 (ERF) 用于测量与决策相关的神经激活率.
- 使用快速频率标记来检测感官输入收益的活动静音调制,反映了先前的情况.
主要成果:
- 证据表明,人体头皮层中存在两种不同的过程:一种反映神经发射速度,用于冲刺选择,另一种反映通过感官增益调制预先的信息.
- 与saccade决策相关的经典升级活动在与事件相关的领域被观察到.
- 通过快速频率标记实现了先前构建的多个saccades,表明传感输入增益的调制.
结论:
- 状皮层中的一连串计算,涉及先前表示,证据积累和整合,构成了交叉状突出地图的基础.
- 这种模型协调了一些发现,在这些发现中,尽管存在证据积累信号,皮层皮层不活化不会影响单一试验的性能.
- 神经发射速率和活动静音突触增益调制代表了在人类大脑中选择和先前集成的独特机制.
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