Electrophysiological signatures of intentional social coordination in the 10-12 Hz range
Electrophysiological signatures of intentional social coordination in the 10-12 Hz range
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DOI：
10.1016/j.neuroimage.2011.08.010
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发表时间：
2012-01-16
期刊：
影响因子：
5.7
通讯作者：
Kelso, J. A. Scott
中科院分区：
文献类型：
--
作者：
Naeem, Muhammad;Prasad, Girijesh;Kelso, J. A. Scott
本研究旨在调查在 mu 频段中操纵社会协调对大脑同步/去同步的影响。 Mu 激活与理解和协调运动行为有关，可能在调节社交互动中发挥关键作用。要求二人组的成员在各种指令下，在有节奏的手指运动协调任务中彼此互动：内在的，二人组的每个成员都被指示保持自己的动作并忽略其伙伴的动作；要求他们与伙伴的动作同步的同相；以及反相位，他们被指示与搭档的动作切分音。在所有三项任务和控制条件下，同时记录两名受试者的脑电图和运动数据。活动条件下脑电图活动与对照的对数功率比用于评估任务背景对 mu 谱域同步/去同步的影响。结果显示，作为协调背景的函数，10-12 Hz 范围内的 mu 频带活动有清晰且系统的调制。在左半球，随着从内在环境过渡到同相环境，再到反相环境，α-mu 抑制的总体水平逐渐增加，但没有特定的中央顶叶焦点。相比之下，右半球的中央顶叶区域显示出特定于环境的变化。内在条件显示右同步随着同相上下文而消失，即使左半球的去同步仍然更大。与中央顶叶区域的左侧相比，反相与右侧更大的 mu 抑制相关。这种不对称的变化与行为动力学的变化高度相关。mu 活动的激活和失活的这些特定模式表明，右侧中央顶叶区域的局部神经回路介导个体如何在自己的行为背景下解释他人的运动。 10-12 Hz 范围内的右侧机制似乎涉及整合二元组成员之间的相互信息，从而使社会互动的动态及时展开。 (C) 2011 Elsevier Inc. 保留所有权利。
This study sought to investigate the effects of manipulating social coordination on brain synchronization/de-synchronization in the mu band. Mu activation is associated with understanding and coordinating motor acts and may play a key role in mediating social interaction. Members of a dyad were required to interact with one another in a rhythmic finger movement coordination task under various instructions: intrinsic where each member of the dyad was instructed to maintain their own and ignore their partner's movement; in-phase where they were asked to synchronize with their partner's movement; and anti-phase where they were instructed to syncopate with their partner's movement. EEG and movement data were recorded simultaneously from both subjects during all three tasks and a control condition. Log power ratios of EEG activity in the active conditions versus control were used to assess the effect of task context on synchronization/de-synchronization in the mu spectral domain.Results showed clear and systematic modulation of mu band activity in the 10-12 Hz range as a function of coordination context. In the left hemisphere general levels of alpha-mu suppression increased progressively as one moved from intrinsic through in-phase to anti-phase contexts but with no specific central-parietal focus. In contrast the right hemisphere displayed context-specific changes in the central-parietal region. The intrinsic condition showed a right synchronization which disappeared with the in-phase context even as de-synchronization remained greater in the left hemisphere. Anti-phase was associated with larger mu suppression in the right in comparison with left at central-parietal region. Such asymmetrical changes were highly correlated with changing behavioral dynamics.These specific patterns of activation and deactivation of mu activity suggest that localized neural circuitry in right central-parietal regions mediates how individuals interpret the movements of others in the context of their own actions. A right sided mechanism in the 10-12 Hz range appears to be involved in integrating the mutual information among the members of a dyad that enables the dynamics of social interaction to unfold in time. (C) 2011 Elsevier Inc. All rights reserved.