Independent component analysis of dynamic brain responses during visuomotor adaptation
Independent component analysis of dynamic brain responses during visuomotor adaptation
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DOI：
10.1016/j.neuroimage.2003.10.037
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发表时间：
2004-03-01
期刊：
影响因子：
5.7
通讯作者：
Kerick, SE
中科院分区：
文献类型：
--
作者：
Contreras-Vidal, JL;Kerick, SE
要调查的空间和时间的变化，在采集的内部模型的一种新的屏幕光标变换的电皮层的大脑活动和手的运动学，我们采用单次试验infomax独立成分分析（伊卡），频谱估计，和运动学方法。参与者在计算机屏幕上显示的笔运动的正常和旋转视觉反馈下进行中心向外的绘画运动。任务相关和适应相关的独立成分的聚类确定了与暴露于扭曲的视觉反馈相关的大脑激活/失活灶的选择性招募，包括与额叶、中枢和侧-后α节律相关的网络，以及与瞬时θ和低β节律相关的额叶-中枢错误相关的负性电位，锁定到运动开始。此外，适应旋转的参考框架与减少施加的方向偏差和减少运动路径长度和运动时间的后期曝光试验，以及后效应后，消除视觉失真。激活的潜在时空模式与视觉适应过程中额叶-顶叶、感觉-运动和前扣带回皮质区的募集一致。(C)2004年爱思唯尔公司All rights reserved.
To investigate the spatial and temporal changes in electro-cortical brain activity and hand kinematics during the acquisition of an internal model of a novel screen-cursor transformation, we employed single-trial infomax independent component analysis (ICA), spectral estimation, and kinematics methods. Participants performed center-out drawing movements under normal and rotated visual feedback of pen movements displayed on a computer screen. Clustering of task-related and adaptation-related independent components identified a selective recruitment of brain activation/deactivation foci associated with the exposure to the distorted visual feedback, including networks associated with frontal-, central-, and lateral- posterior alpha rhythms, and frontal-central error-related negativity potential associated with transient theta and low beta rhythms locked to movement onset. Moreover, adaptation to the rotated reference frame was associated with a reduction in the imposed directional bias and decreases in movement path length and movement time by late-exposure trials, as well as after-effects after removal of the visual distortion. The underlying spatiotemporal pattern of activations is consistent with recruitment of frontal- parietal, sensory-motor, and anterior cingulate cortical areas during visuomotor adaptation. (C) 2004 Elsevier Inc. All rights reserved.