Tash R R, Kier E L, Chyatte D
Department of Diagnostic Imaging, Yale University School of Medicine, New Haven, CT 06510.
J Comput Assist Tomogr. 1988 May-Jun;12(3):492-4. doi: 10.1097/00004728-198805010-00027.
Hemifacial spasm is a symptom complex comprising involuntary, painless spasms of the orbicularis muscle that may progress to involve all facial muscles. It is frequently the result of compression of the facial nerve at its root exit zone from the brain stem by vascular loops or aneurysms of the posterior inferior cerebellar artery, anterior inferior cerebellar artery, vertebral artery, or cochlear artery. Coronal and axial T1-weighted images clearly depict the course of the facial nerve from the brain stem to the internal auditory canal and its relation to the vertebrobasilar system. This case demonstrates the magnetic resonance appearance of a tortuous vertebral artery and its relationship to the facial nerve in a patient with long standing hemifacial spasm.
面肌痉挛是一种症状复合体，包括眼轮匝肌的不自主、无痛性痉挛，可进展至累及所有面部肌肉。它通常是由于小脑后下动脉、小脑前下动脉、椎动脉或蜗神经动脉的血管襻或动脉瘤在面神经从脑干的根出口区对其造成压迫所致。冠状位和轴位T1加权图像能清晰显示面神经从脑干至内耳道的走行及其与椎基底系统的关系。本病例展示了一名长期面肌痉挛患者中迂曲椎动脉的磁共振表现及其与面神经的关系。
