Serrien Deborah J
School of Psychology, University of Nottingham, University Park, Nottingham, United Kingdom.
Hum Brain Mapp. 2009 Feb;30(2):523-31. doi: 10.1002/hbm.20518.
Everyday behaviour often depends on the performance of multiple movements executed in a particular order. Here, the impact of task history on the neural activation patterns of motor behaviour is examined by evaluating unimanual and bimanual actions that are produced in a serial arrangement, such that switching between tasks is required. Cortical dynamics was assessed by means of EEG coherence in the beta frequency band (13-30 Hz). Results showed that although behavioural performance was not affected, switching trials induced increased coherence as compared to control (repeat) trials. This reorganization was dependent on task history and was more pronounced for unimanual than for bimanual tasks. Overall, the data illustrate that neural processing of motor behaviour within a serial arrangement integrates past and present activity, and accordingly impacts on neural efficiency.
日常行为通常取决于按特定顺序执行的多个动作的表现。在此，通过评估以序列方式产生的单手和双手动作来研究任务历史对运动行为神经激活模式的影响，这些动作需要在任务之间进行切换。通过β频段（13 - 30Hz）的脑电图相干性来评估皮层动力学。结果表明，尽管行为表现未受影响，但与对照（重复）试验相比，切换试验诱导了更高的相干性。这种重组依赖于任务历史，并且在单手动任务中比在双手任务中更明显。总体而言，数据表明在序列安排中运动行为的神经处理整合了过去和当前的活动，并相应地影响神经效率。
