Department of Neurosurgery, Baylor College of Medicine, Houston, TX, USA.
Department of Occupational Therapy, University of Alberta, Edmonton, AB, Canada.
Hum Mov Sci. 2021 Aug;78:102819. doi: 10.1016/j.humov.2021.102819. Epub 2021 May 26.
Mu oscillations (8-13 Hz), recorded over the human motor cortex, have been shown to consistently suppress during both the imagination and performance of movements; however, its functional significance in the imagery process is currently unclear. Here we examined human electroencephalographic (EEG) oscillations in the context of motor imagery performance as measured by imagery success within participants and imagery ability between participants. We recorded continuous EEG activity while participants performed the Test of Ability in Movement Imagery (TAMI), an objective test of motor imagery task. Results demonstrated that mu oscillatory activity significantly decreased during successful as compared to unsuccessful imagery trials. However, the extent of reduction in mu oscillations did not correlate with overall imagery ability as measured by the total TAMI score. These findings provide further support for the involvement of mu oscillations in indexing motor imagery performance and suggest that mu oscillations may reflect important processes related to imagery accuracy, processes likely related to those underlying overt motor production and motor understanding.
mu 振荡（8-13Hz），记录在人类运动皮层上，在想象和运动表现时一致被显示出抑制；然而，其在想象过程中的功能意义目前尚不清楚。在这里，我们研究了运动想象表现的人类脑电图（EEG）振荡，通过参与者内的想象成功和参与者间的想象能力来衡量。我们记录了参与者执行运动想象测试（TAMI）时的连续 EEG 活动，这是一项运动想象任务的客观测试。结果表明，与不成功的想象试验相比，mu 振荡活动在成功的想象试验中显著降低。然而，mu 振荡的减少程度与总 TAMI 评分衡量的整体想象能力无关。这些发现进一步支持了 mu 振荡在索引运动想象表现中的作用，并表明 mu 振荡可能反映了与想象准确性相关的重要过程，这些过程可能与运动产生和运动理解的过程有关。
