有效副本
推论
神经科学
心理学
沟通
感觉系统
数学
纯数学
作者
Siqi Li,Hao Zhu,Xing Tian
出处
期刊:Cerebral Cortex
[Oxford University Press]
日期:2020-05-20
卷期号:30 (11): 5806-5820
被引量:25
标识
DOI:10.1093/cercor/bhaa154
摘要
Abstract Actions influence sensory processing in a complex way to shape behavior. For example, during actions, a copy of motor signals—termed “corollary discharge” (CD) or “efference copy” (EC)—can be transmitted to sensory regions and modulate perception. However, the sole inhibitory function of the motor copies is challenged by mixed empirical observations as well as multifaceted computational demands for behaviors. We hypothesized that the content in the motor signals available at distinct stages of actions determined the nature of signals (CD vs. EC) and constrained their modulatory functions on perceptual processing. We tested this hypothesis using speech in which we could precisely control and quantify the course of action. In three electroencephalography (EEG) experiments using a novel delayed articulation paradigm, we found that preparation without linguistic contents suppressed auditory responses to all speech sounds, whereas preparing to speak a syllable selectively enhanced the auditory responses to the prepared syllable. A computational model demonstrated that a bifurcation of motor signals could be a potential algorithm and neural implementation to achieve the distinct functions in the motor-to-sensory transformation. These results suggest that distinct motor signals are generated in the motor-to-sensory transformation and integrated with sensory input to modulate perception.
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