Timecourse of mirror and counter-mirror effects measured with transcranial magnetic stimulation
Timecourse of mirror and counter-mirror effects measured with transcranial magnetic stimulation
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DOI：
10.1093/scan/nst085
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发表时间：
2014-08-01
影响因子：
4.2
通讯作者：
Catmur, Caroline
中科院分区：
文献类型：
--
作者：
Cavallo, Andrea;Heyes, Cecilia;Catmur, Caroline
在过去的二十年里，人类的镜像系统一直是许多研究的主题，但对镜像反应的时间过程知之甚少。此外，目前还不清楚镜像和反镜像效应是否遵循相同的时间进程。我们使用单脉冲经颅磁刺激来研究人脑中镜像和反镜像反应的时间过程。实验1表明，镜像反应可以从观察到的动作开始后约200毫秒测量。实验2证明了显着的效果，反镜感觉运动训练在所有的时间点，在实验1中发现的镜像反应（即从200毫秒向前），表明镜像和反镜反应遵循相同的时程。通过提出类似的直接路线的镜像和反镜像反应，这些结果支持镜像神经元起源的关联帐户，从而镜像反应出现作为一个结果，在发展过程中相关的感觉运动经验。更一般地说，它们通过对镜像反应影响社会认知的速度提供一些限制，有助于建立镜像神经元功能的理论。
The human mirror system has been the subject of much research over the past two decades, but little is known about the timecourse of mirror responses. In addition, it is unclear whether mirror and counter-mirror effects follow the same timecourse. We used single-pulse transcranial magnetic stimulation to investigate the timecourse of mirror and counter-mirror responses in the human brain. Experiment 1 demonstrated that mirror responses can be measured from around 200 ms after observed action onset. Experiment 2 demonstrated significant effects of counter-mirror sensorimotor training at all timepoints at which a mirror response was found in Experiment 1 (i.e. from 200 ms onward), indicating that mirror and counter-mirror responses follow the same timecourse. By suggesting similarly direct routes for mirror and counter-mirror responses, these results support the associative account of mirror neuron origins whereby mirror responses arise as a result of correlated sensorimotor experience during development. More generally, they contribute to theorizing regarding mirror neuron function by providing some constraints on how quickly mirror responses can influence social cognition.