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Abstract：
In the present report, we discussed the case of a 57-year-old man with unilateral masticatory muscle weakness, nystagmus, skew deviation and facial hypesthesia due to pontine tegmental infarction. Trigeminal motor neuropathy attributed to brain infarction is very rare. Brain magnetic resonance imaging revealed a small dot-like infarction lesion in the pontine tegmentum. Masticatory muscle weakness was confirmed by an electrophysiological study performed on the day after admission in which there was an incomplete interference pattern without spontaneous denervation activity, suggesting that the patient\'s masseter muscle weakness was caused by an infarction of the trigeminal motor nucleus proper or trigeminal motor nerve fascicles rather than Wallerian degeneration of the trigeminal nerve or the progression of masseter muscle degeneration.
摘要：
在本报告中，我们讨论了一个57岁的男性单侧咀嚼肌无力的案例，眼球震颤,由于桥脑被盖梗死导致的歪斜和面部感觉减退。归因于脑梗塞的三叉神经运动神经病非常罕见。脑磁共振成像显示脑桥被盖层有一个小的点状梗塞病变。在入院后第二天进行的电生理研究证实了咀嚼肌无力，其中存在不完全的干扰模式，没有自发的去神经活动。提示患者的咬肌无力是由三叉神经运动核本身或三叉神经运动神经束梗死引起的，而不是三叉神经的华勒变性或咬肌变性的进展。
