Investigate of central nervous system related to tooth clenching

我们项目的长期目标是阐明以频繁咬牙为特征的潜在的清醒磨牙症的机制。在这一学期中，我们调查了脊髓和三叉神经肌肉活动之间视觉反馈的影响的比较，以及通过咬肌运动诱发电位评估重复和标准化咬合任务对皮质运动兴奋性的影响。我们的研究结果表明，视觉反馈对脊神经支配的肌肉和三叉神经支配的肌肉之间的控制以及对反复咬牙任务引起的咬肌皮质运动控制的神经可塑性的影响是不同的。

The long term aim of our project is to elucidate mechanisms potentially underlying awake bruxism which is characterized by frequent tooth-clenching. In this term, we investigated comparison of the influence of visual feedback between spinal and trigeminal muscle activity, and the effect of repeated and standardized tooth clenching tasks on corticomotor excitability as assessed by motor evoked potentials in the masseter muscle. Our findings suggest that influence of visual feedback was different contributes significantly to the control of both between spinally-innervated and trigeminally-innervated muscles, and neuroplasticity in the corticomotor control of the masseter muscles evoked by repeated tooth-clenching tasks.