Kodama Takayuki, Nakano Hideki, Katayama Osamu, Murata Shin
Department of Physical Therapy, Faculty of Health Sciences, Kyoto Tachibana University, Kyoto, Japan.
Department of Neurorehabilitation, Graduate School of Health Sciences, Kio University, Nara, Japan.
Restor Neurol Neurosci. 2017;35(6):683-692. doi: 10.3233/RNN-170771.
The association between motor imagery ability and brain neural activity that leads to the manifestation of a motor illusion remains unclear.
In this study, we examined the association between the ability to generate motor imagery and brain neural activity leading to the induction of a motor illusion by vibratory stimulation.
The sample consisted of 20 healthy individuals who did not have movement or sensory disorders. We measured the time between the starting and ending points of a motor illusion (the time to illusion induction, TII) and performed electroencephalography (EEG). We conducted a temporo-spatial analysis on brain activity leading to the induction of motor illusions using the EEG microstate segmentation method. Additionally, we assessed the ability to generate motor imagery using the Japanese version of the Movement Imagery Questionnaire-Revised (JMIQ-R) prior to performing the task and examined the associations among brain neural activity levels as identified by microstate segmentation method, TII, and the JMIQ-R scores.
The results showed four typical microstates during TII and significantly higher neural activity in the ventrolateral prefrontal cortex, primary sensorimotor area, supplementary motor area (SMA), and inferior parietal lobule (IPL). Moreover, there were significant negative correlations between the neural activity of the primary motor cortex (MI), SMA, IPL, and TII, and a significant positive correlation between the neural activity of the SMA and the JMIQ-R scores.
These findings suggest the possibility that a neural network primarily comprised of the neural activity of SMA and M1, which are involved in generating motor imagery, may be the neural basis for inducing motor illusions. This may aid in creating a new approach to neurorehabilitation that enables a more robust reorganization of the neural base for patients with brain dysfunction with a motor function disorder.
运动想象能力与导致运动错觉表现的脑神经元活动之间的关联尚不清楚。
在本研究中，我们考察了产生运动想象的能力与通过振动刺激诱发运动错觉的脑神经元活动之间的关联。
样本包括20名无运动或感觉障碍的健康个体。我们测量了运动错觉起始点与终点之间的时间（错觉诱发时间，TII）并进行了脑电图（EEG）检测。我们使用EEG微状态分割方法对导致运动错觉诱发的脑活动进行了颞-空间分析。此外，在执行任务前，我们使用日语版修订的运动想象问卷（JMIQ-R）评估了运动想象生成能力，并考察了微状态分割方法确定的脑神经元活动水平、TII和JMIQ-R分数之间的关联。
结果显示在TII期间有四种典型的微状态，并且腹外侧前额叶皮层、初级感觉运动区、辅助运动区（SMA）和顶下小叶（IPL）的神经活动显著更高。此外，初级运动皮层（MI）、SMA、IPL的神经活动与TII之间存在显著负相关，SMA的神经活动与JMIQ-R分数之间存在显著正相关。
这些发现提示，一个主要由参与产生运动想象的SMA和M1的神经活动组成的神经网络可能是诱发运动错觉的神经基础。这可能有助于创建一种新的神经康复方法，使运动功能障碍的脑功能障碍患者能够更有力地重组神经基础。
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