Localized high gamma motor oscillations respond to perceived biologic motion.
Localized high gamma motor oscillations respond to perceived biologic motion.
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DOI：
10.1097/wnp.0b013e3182872f40
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发表时间：
2013-06
期刊：
影响因子：
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通讯作者：
Murias M
中科院分区：
文献类型：
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作者：
Darvas F;Rao RP;Murias M
在动作观察过程中，人类运动区和运动前区中β频率范围（17-25 Hz）的功率变化与镜像神经元系统（MNS）有关，并已被广泛研究。这些变化模拟实际运动执行期间的运动活动，尽管强度降低。最近的非侵入性（EEG/MEG）和侵入性研究（ECoG）已经表明，在实际运动期间，β功率变化伴随着高伽马（HG）频带（70-100 Hz）中的高度局部化的变化。在这项研究中，我们调查，使用27通道脑电图结合一个通用的头部模型和皮层映射算法，是否这样的高伽玛变化也存在于运动观察。受试者观看了一段2.7秒的移动手视频，与一段等长的移动风景视频形成对比。我们的研究结果表明，非偏侧β带的功率下降，响应于移动的手与响应于移动的风景。我们还发现高伽马功率显著增加。然而，与β波段反应不同的是，该波段的增加是偏侧的，偏好优势手的半球。
Power changes in the beta frequency range (17–25 Hz) in the human motor and premotor areas during action observation have been associated with the mirror neuron system (MNS) and have been studied extensively. These changes mimic motor activity during actual motion execution, albeit reduced in strength. Recent non-invasive (EEG/MEG) and invasive studies (ECoG) have shown that during actual motion, beta power changes are accompanied by highly localized changes in the high gamma (HG) band (70–100 Hz). In this study we investigate, using 27 channel EEG in combination with a generic head model and a cortical mapping algorithm, whether such high gamma changes are also present during motion observation. Subjects were presented with a 2.7 s video of a moving hand, contrasted with a video of moving scenery of equal length. Our results show non-lateralized beta band decrease in power in response to the moving hand vs. the response to the moving scenery. We also find significant increase in high gamma power. However, unlike the beta band response, increases in this band are lateralized, with a preference for the hemisphere of the dominant hand.