Neural changes induced by learning a challenging perceptual-motor task
Neural changes induced by learning a challenging perceptual-motor task
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DOI：
10.1016/j.neuroimage.2008.03.023
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发表时间：
2008-07-15
期刊：
影响因子：
5.7
通讯作者：
Beek, P. J.
中科院分区：
文献类型：
--
作者：
Houweling, S.;Daffertshofer, A.;Beek, P. J.
我们研究了神经的变化，伴随着学习的感知运动任务，涉及多节奏双手力的生产。运动学习的特点是性能的稳定性增加。为了评估相应的神经网络中的后效，记录并分析了（事件相关的）振幅变化和同步模式的磁全息图和肌电图信号。网络的拓扑结构首先使用波束形成器分析来识别，该分析揭示了皮层区域和小脑半球中激活的差异效应。我们发现事件相关的（去）同步的β-活动在双侧皮质运动区和α-调制小脑。学习后的α调制增加，同时，双边M1耦合增加周围的运动频率，反映改善电机定时。此外，初级运动区之间的半球间γ同步减少，这可能反映了学习后注意力需求的减少。(c)2008年爱思唯尔公司All rights reserved.
We studied the neural changes accompanying the learning of a perceptual-motor task involving polyrhythmic bimanual force production. Motor learning was characterized by an increase in stability of performance. To assess after-effects in the corresponding neural network, magnetoencophalographic and electromyographic signals were recorded and analyzed in terms of (event-related) amplitude changes and synchronization patterns. The topology of the network was first identified using a beamformer analysis, which revealed differential effects of activation in cortical areas and cerebellar hemispheres. We found event-related (de-)synchronization of beta-activity in bilateral cortical motor areas and alpha-modulations in the cerebellum. The alpha-modulation increased after learning and, simultaneously, the bilateral M1 coupling increased around the movement frequency reflecting improved motor timing. Furthermore, the inter-hemispheric gamma-synchronization between primary motor areas decreased, which may reflect a reduced attentional demand after learning. (c) 2008 Elsevier Inc. All rights reserved.