Brain Patterns During Single- and Dual-Task Leg Movements
Brain Patterns During Single- and Dual-Task Leg Movements
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单任务和双任务腿部运动期间的大脑模式
DOI：
10.1166/jmihi.2021.3348
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发表时间：
2021-03-01
影响因子：
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通讯作者：
Chen, Chao
中科院分区：
文献类型：
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作者：
Li, Penghai;Xu, Han;Chen, Chao
大脑能够从事双重任务，如运动想象（MI）和动作观察（AO）或运动执行（ME）与动作观察。在这项研究中，我们定量地比较了事件相关去极化（ERD）模式在任务的纯MI，MI与AO（O-MI），ME，ME与AO（O-ME）的腿，以探讨潜在的神经元机制使用EEG。在O-MI和O-ME任务期间，受试者被指示想象或执行有节奏的动作，同时观看腿部运动的视频;相反，受试者在纯MI和ME任务期间想象并执行腿部运动而不观察任何视频。我们注意到MI、O-MI、ME和O-ME的ERD在大脑中央区域的幅度依次增加。利用这些量化的ERD模式研究了四种任务中脑振荡变化的差异。我们发现，与单纯MI相比，O-MI运动区的ERD更为明显。这些结果表明，O-MI比MI产生更强的运动激活。此外，O-ME在β带中的激活明显高于ME。O-ME比MI产生更强的神经生理效应，比ME产生更强的行为效应。这些实验结果为MI或ME与动作观察相结合的双重任务对脑模式变化的影响提供了令人信服的证据。目标导向的腿部动作的视频最有可能能够提高执行或想象动作的能力。O-MI和O-ME在下肢康复和运动技能训练中可能获得更好、更接近的疗效。ERD的程度分析可为评价O-MI和O-ME在下肢康复和运动技能训练中的能力提供依据。
The brain is able to engage in dual tasks such as motor imagery (MI) and action observation (AO) or motor execution (ME) with action observation. In this study, we have quantitatively compared event-related desynchronization (ERD) patterns during tasks of pure MI, MI with AO (O-MI), ME, and ME with AO (O-ME) of the leg to investigate the underlying neuronal mechanisms using EEG. Subjects were instructed to imagine or perform rhythmical actions while watching a video of leg movements during O-MI and O-ME tasks; In contrast, subjects imagined and performed the leg movements without observing any video during pure MI and ME tasks. We noticed that the amplitude of ERDs from MI, O-MI, ME and O-ME sequentially increases in central regions of the brain. These quantified ERD patterns in EEG were used to study the differences of brain oscillatory changes among the four tasks. We found that ERDs in motor area were more distinct in O-MI, compared with pure MI. These results suggest that O-MI produced stronger motor activations than MI. Plus, O-ME showed significantly greater activations than ME in the beta band. O-ME has produced stronger neurophysiological effects than MI, and stronger behavioral effects than ME. These empirical results do provide convincing evidence of the dual tasks such combined MI or ME with action observation on brain pattern changes. The video of the goal-directed leg movements is most likely able to improve the ability of performing or imagining movements. O-MI and O-ME may get better and closer therapeutic effects in leg rehabilitation and motor skill training. Furthermore, the extent analysis of ERD may provide the basis for evaluating the ability of O-MI and O-ME in leg rehabilitation and motor skill training.