Infant's brain responses to live and televised action
Infant's brain responses to live and televised action
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DOI：
10.1016/j.neuroimage.2006.03.044
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发表时间：
2006-08-15
期刊：
影响因子：
5.7
通讯作者：
Hiraki, Kazuo
中科院分区：
文献类型：
--
作者：
Shimada, Sotaro;Hiraki, Kazuo
人类婴儿对电视上的刺激的感知方式是否在很大程度上与对现场刺激的感知方式相同，目前尚不清楚。动作观察已被广泛证实可以引起内部运动表征的激活，为研究这一问题提供了一个很有前途的框架。这种镜像匹配的特性在猴子的运动前皮质以及人类成人的运动前和初级运动皮质中都被发现。尽管已有报道称，与电视转播的动作相比，成人受试者在观察现场动作时的激活程度更大，但尚不清楚人类婴儿是否也获得了同样的神经反应。为了解决这个问题，我们首先使用近红外光谱测量了成年受试者在观看其他人的现场或电视转播动作时运动区的活动。当受试者自己执行动作时，被激活的运动区也会在现场观察动作时被激活，而这在电视环境中并不明显。然后，我们定性地对6到7个月大的婴儿进行了同样的实验。当观察活人做动作时，婴儿的运动区被显著激活。虽然我们在电视场景中的动作观察中也发现了同一区域的激活，但动作观察和物体运动观察之间的活动差异只有在现场环境中才显著。我们的结果首次证明了在人类婴儿的动作观察中运动区的激活。我们认为，人脑对现实世界和虚拟世界的反应是不同的。(C)2006 Elsevier Inc.保留所有权利。
Whether human infants perceive televised stimuli in the same way to live stimuli largely remains unknown. Action observation, which has been extensively confirmed to elicit activation of internal motor representation, provides a promising framework for investigating this issue. This 'mirror-matching' property has been found in the monkey premotor cortex as Well as the premotor and primary motor cortices in human adults. Although larger activation in observing a live action compared to a televised action in adult subjects has been reported, it is unknown whether the same neural response is obtained from human infants. To address this issue, we first measured the activity of motor areas in adult subjects while viewing either a live or televised action of other people by using near-infrared spectroscopy. The motor areas that were activated when the subject themselves performed an action were also activated during action observation in the live setting, while this was not evident in the TV setting. We then conducted qualitatively the same experiment with 6- to 7-month-old infants. The infant's motor areas were significantly activated when observing a live person performing an action. Although we also found activation in the same area during action observation in the TV setting, the difference in activity between action observation and object-motion observation was significant only in the live setting. Our results are the first to demonstrate activation in motor areas during action observation in human infants. We suggest that human brain responds differently to the real world and the virtual world. (c) 2006 Elsevier Inc. All rights reserved.