Electrocortical Dynamics Reflect Age-Related Differences in Movement Kinematics among Children and Adults
Electrocortical Dynamics Reflect Age-Related Differences in Movement Kinematics among Children and Adults
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DOI：
10.1093/cercor/bhq162
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发表时间：
2011-04-01
期刊：
影响因子：
3.7
通讯作者：
Clark, Jane E.
中科院分区：
文献类型：
--
作者：
Pangelinan, Melissa M.;Kagerer, Florian A.;Clark, Jane E.
以前的神经影像学和行为学研究表明，整个儿童时期运动系统的结构和功能变化。然而，目前还不清楚是什么功能相关的皮层电过程的基础上发展的差异，在多关节，目标导向运动的运动规划和控制。目前的研究特点与年龄有关的差异，在皮层电过程中的离散目标运动的儿童和成人的性能。记录了3组参与者（每组n = 15）的脑电图和运动学：幼儿（平均6.7岁）、大龄儿童（平均10.2岁）和成人（平均22.1岁）。脑电（EEG）信号中明显存在与脑电相关的差异。首先，与成年人相比，幼儿在任务相关运动区表现出较少的运动相关活动（运动相关皮层电位）。第二，与其他组相比，年幼的儿童表现出更大的激活（更少的阿尔法功率）的额叶区和更少的激活顶叶区。在行为层面上，与年龄较大的儿童和成人相比，幼儿的动作更慢，更急，方向规划更不一致。EEG和运动学测量之间也存在显著相关性。综上所述，本研究的结果提供的证据表明，年龄相关的运动规划和性能的质量差异反映在儿童和成人之间的皮层电动力学的差异。
Previous neuroimaging and behavioral studies demonstrated structural and functional changes in the motor system across childhood. However, it is unclear what functionally relevant electrocortical processes underlie developmental differences in motor planning and control during multijoint, goal-directed movements. The current study characterized age-related differences in electrocortical processes during the performance of discrete aiming movements in children and adults. Electroencephalography and movement kinematics were recorded from 3 groups of participants (n = 15 each): young children (mean 6.7 years), older children (mean 10.2 years), and adults (mean 22.1 years). Age-related differences were evident in the electroencephalographic (EEG) signals. First, young children exhibited less movement-related activity in task-relevant motor areas compared with adults (movement-related cortical potentials). Second, young children exhibited greater activation (less alpha power) of the frontal areas and less activation of the parietal areas as compared with the other groups. At the behavioral level, young children made slower and jerkier movements, with less consistent directional planning compared with older children and adults. Significant correlations were also found between EEG and movement kinematic measures. Taken together, the results of this study provide evidence that age-related differences in the quality of motor planning and performance are reflected in the differences in electrocortical dynamics among children and adults.