An fMRI study of perception and action in deaf signers.
An fMRI study of perception and action in deaf signers.
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对聋人手语者感知和行动的功能磁共振成像研究。
DOI：
10.1016/j.neuropsychologia.2016.01.015
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发表时间：
2016
期刊：
影响因子：
2.6
通讯作者：
Hickok,Gregory
中科院分区：
文献类型：
--
作者：
Okada,Kayoko;Rogalsky,Corianne;O'Grady,Lucinda;Hanaumi,Leila;Bellugi,Ursula;Corina,David;Hickok,Gregory
自从镜像神经元被发现以来，人们对理解感知和动作之间的关系以及人类镜像系统在语言理解和产生中的作用产生了极大的兴趣。两个问题主导了研究。其中一个涉及布罗卡区在言语感知中的作用。另一个是关于运动系统在更广泛地理解与动作相关的语言中的作用。目前的研究调查这两个问题的方式，桥梁的语言研究与手动操作的研究。我们研究了观察和执行美国手语（ASL）的对象和动作符号的神经基础。在一项功能磁共振成像实验中，失聪者产生描绘动作和物体的符号，以及观察/理解动作和物体的符号。不同模式的激活被发现观察和执行，虽然与重叠的布罗卡区，提供初步证据支持的说法，即运动系统参与语言知觉。相比之下，我们发现没有证据表明，动作相关的迹象差异涉及运动系统相比，对象相关的迹象。这些研究结果进行了讨论的背景下，手语执行和观察的病变研究。在这个更广泛的背景下，我们得出结论，在ASL观察过程中激活布罗卡区是没有因果关系的手语理解。
Since the discovery of mirror neurons, there has been a great deal of interest in understanding the relationship between perception and action, and the role of the human mirror system in language comprehension and production. Two questions have dominated research. One concerns the role of Broca's area in speech perception. The other concerns the role of the motor system more broadly in understanding action-related language. The current study investigates both of these questions in a way that bridges research on language with research on manual actions. We studied the neural basis of observing and executing American Sign Language (ASL) object and action signs. In an fMRI experiment, deaf signers produced signs depicting actions and objects as well as observed/comprehended signs of actions and objects. Different patterns of activation were found for observation and execution although with overlap in Broca's area, providing prima facie support for the claim that the motor system participates in language perception. In contrast, we found no evidence that action related signs differentially involved the motor system compared to object related signs. These findings are discussed in the context of lesion studies of sign language execution and observation. In this broader context, we conclude that the activation in Broca's area during ASL observation is not causally related to sign language understanding.