Neural dynamics of perceptual inference and its reversal during imagery
Neural dynamics of perceptual inference and its reversal during imagery
复制标题
DOI：
10.7554/elife.53588
复制
发表时间：
2020-07-20
期刊：
影响因子：
7.7
通讯作者：
van Gerven, Marcel
中科院分区：
文献类型：
--
作者：
Dijkstra, Nadine;Ambrogioni, Luca;van Gerven, Marcel
在视觉刺激呈现之后，神经处理从低水平的感觉区域级联到更高水平区域中越来越抽象的表征。人们经常假设，在没有感觉输入的情况下，抽象表征被用来构建感觉表征，这是心理图像产生的基础。根据预测加工理论，这种反向加工在感知的后期阶段也起着核心作用。神经信息流逆转的直接实验证据一直缺失。在这里，我们使用机器学习和脑磁图的组合来模拟人类的神经动力学。我们提供了直接的证据，知觉前馈级联反转在图像和显示，在感知过程中，这种逆转交替与前馈处理在11 Hz的振荡模式。总之，这些结果表明，共同的反馈过程如何支持真实感知和心理意象。
After the presentation of a visual stimulus, neural processing cascades from low-level sensory areas to increasingly abstract representations in higher-level areas. It is often hypothesised that a reversal in neural processing underlies the generation of mental images as abstract representations are used to construct sensory representations in the absence of sensory input. According to predictive processing theories, such reversed processing also plays a central role in later stages of perception. Direct experimental evidence of reversals in neural information flow has been missing. Here, we used a combination of machine learning and magnetoencephalography to characterise neural dynamics in humans. We provide direct evidence for a reversal of the perceptual feed-forward cascade during imagery and show that, during perception, such reversals alternate with feed-forward processing in an 11 Hz oscillatory pattern. Together, these results show how common feedback processes support both veridical perception and mental imagery.