Hemispheric asymmetries and the control of motor sequences
Hemispheric asymmetries and the control of motor sequences
复制标题
半球不对称和运动序列的控制
DOI：
10.1016/j.bbr.2015.01.021
复制
发表时间：
2015
影响因子：
2.7
通讯作者：
Michiel M. Sovijärvi
中科院分区：
文献类型：
--
作者：
D. Serrien;Michiel M. Sovijärvi
手指位置的排序反映了熟练行为的原型。为了执行排序，认知控制支持要求和姿势转换。在这项脑电图 (EEG) 研究中，我们评估了左手和右手惯用手优势的影响，并评估了单手和双手测序的神经相关性。行为测量提供了响应计划（第一次按键的响应时间）和响应执行（连续按键之间的时间、点击/秒和正确响应的百分比）的指数，而神经动力学则通过脑电图一致性来确定，表达了大脑区域之间的功能连接。计算大脑活动和行为之间的相关性，以探索与测序功能相关的神经相关性。响应计划和执行过程中的大脑行为相关性揭示了左半球回路的重要性，强调了它在组织目标导向行为中的重要作用。这种偏侧化特征与内在约束（手的优势）和外在要求（任务要求）无关，表明左半球有必要的高阶计算。总体而言，观察结果强调，左撇子和右撇子的左半球专门负责顺序运动组织，这表明复合动作和技能表现存在内源性半球不对称性；这些过程可以与涉及手优势的过程分开。
Sequencing of finger positions reflects a prototype of skilled behaviour. In order to perform sequencing, cognitive control supports the requirements and postural transitions. In this electroencephalography (EEG) study, we evaluate the effects of hand dominance and assess the neural correlates of unimanual and bimanual sequencing in left- and right-handers. The behavioural measurements provided an index of response planning (response time to first key press) and response execution (time between successive key presses, taps/s and percentage of correct responses), whereas the neural dynamics was determined by means of EEG coherence, expressing the functional connectivity between brain areas. Correlations between brain activity and behaviour were calculated for exploring the neural correlates that are functionally relevant for sequencing. Brain–behavioural correlations during response planning and execution revealed the significance of circuitry in the left hemisphere, underlining its significant role in the organisation of goal-directed behaviour. This lateralisation profile was independent of intrinsic constraints (hand dominance) and extrinsic demands (task requirements), suggesting essential higher-order computations in the left hemisphere. Overall, the observations highlight that the left hemisphere is specialised for sequential motor organisation in left- and right-handers, suggesting an endogenous hemispheric asymmetry for compound actions and the representation of skill; processes that can be separated from those that are involved in hand dominance.
影响因子：
14.5
作者：
Haaland, KY;Harrington, DL;Knight, RT
通讯作者：
Knight, RT
影响因子：
16.2
作者：
Hipp, Joerg F.;Engel, Andreas K.;Siegel, Markus
通讯作者：
Siegel, Markus
影响因子：
3.7
作者：
Johnson-Frey, SH;Newman-Norlund, R;Grafton, ST
通讯作者：
Grafton, ST