Human cortical electroencephalography (EEG) rhythms during the observation of simple aimless movements: A high-resolution EEG study
Human cortical electroencephalography (EEG) rhythms during the observation of simple aimless movements: A high-resolution EEG study
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DOI：
10.1006/nimg.2002.1192
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发表时间：
2002-10-01
期刊：
影响因子：
5.7
通讯作者：
Rossini, PM
中科院分区：
文献类型：
--
作者：
Babiloni, C;Babiloni, F;Rossini, PM
在目前的高分辨率脑电图（EEG）研究中，我们计算了事件相关的去同步化和同步（ERD/ERS）的a（约10 Hz）和β（约20 Hz）的节奏与执行（视觉反馈）和观察轻快的单侧左右无目的的手指运动。第一个范围是测试地形的“功能等效性”的皮质节律相关的运动执行和观察，这将是一个理想的皮质观察/执行匹配系统。第二个范围是评估与运动观察相比，运动执行相关的皮质节律性的左半球或右半球患病率的假设。记录10名健康右利手志愿者的EEG（128个电极）。MRI约束头部模型上的表面拉普拉斯估计空间增强EEG数据。在这两种情况下，ERD在运动执行或观察期间达到峰值，并被ERS“反弹”或“恢复”所取代，后者在事件后期间达到峰值。地形结果有利于“功能等效”（即，在幅度和时间上相似的ERD/ERS值）的α和β节律性。相反，节律性的功能等效性可以忽略不计（即，在幅度和时间上不同的ERD/ ERS值），其可以是区分自己的运动强度和其他人的无目的运动的神经基质（即，与感觉运动、姿势和运动学表示相结合的视觉变换）。最后，半球皮质节律性的模式不支持运动观察功能在左半球或右半球的“简单集中”。(C)2002 Elsevier Science（美国）。
In the present high-resolution electroencephalographic (EEG) study, we computed event-related desynchronization and synchronization (ERD/ERS) of a (about 10 Hz) and beta (about 20 Hz) rhythms in association with the execution (with visual feedback) and observation of brisk unilateral right and left aimless finger movements. A first scope was to test the topographical "functional equivalence" of cortical rhythmicity related to movement execution and observation, which would represent an ideal cortical observation/execution matching system. A second scope was to evaluate the hypothesis of a left or right hemisphere prevalence of the cortical rhythmicity related to the movement observation compared to the movement execution. EEG (128 electrodes) was recorded in 10 healthy right-handed volunteers. Surface Laplacian estimation spatially enhanced EEG data over a MRI-constraint head model. Under both conditions, ERD peaked during the movement execution or observation and was replaced by a ERS "rebound" or "recovery," which peaked during the postevent period. Topographical results are in favor of a "functional equivalence" (i.e., similar ERD/ERS values in magnitude and timing) of alpha and beta rhythmicity in central scalp regions overlying premotor/primary sensorimotor cortex. On the contrary, the functional equivalence of a rhythmicity was negligible (i.e., different ERD/ ERS values in magnitude and timing) in parietal-occipital scalp regions overlying posterior parietal and parieto-occipital cortex, which could be the neural substrate to distinguish among the own motor intensions and others' aimless movements (i.e., visuomotor transformation integrated with sensorimotor, postural, and kinematics representations). Finally, the pattern of hemispherical cortical rhythmicity did not support a "simple concentration" of movement observation functions in the left or right hemisphere. (C) 2002 Elsevier Science (USA).