Bae Seong Hoon, Jeon Yutae, Hong Chang Ki, Song Chan Il
Department of Otorhinolaryngology, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea.
Department of Otorhinolaryngology, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea.
Acta Neurol Belg. 2023 Feb;123(1):93-97. doi: 10.1007/s13760-021-01632-2. Epub 2021 Mar 1.
Hemifacial spasm (HFS) is a motor disorder caused by the vascular compression of the facial nerve in the posterior fossa. The cochleovestibular nerve is close to the facial nerve and shares the same entry to the periphery, also has disorders caused by vascular compression. We evaluated the cochleovestibular nerve function in patients with HFS based on the hypothesis that vascular compression, which causes HFS, can also affect the nearby cochleovestibular nerve function. The medical charts of 49 patients with surgically confirmed HFS were reviewed retrospectively. The results of the pure-tone threshold, auditory brainstem response (ABR), video head impulse test (vHIT), and magnetic resonance imaging were analyzed. In each patient, the HFS side and the unaffected side were compared in the paired manner. The anterior inferior cerebellar artery was the major offending vessel (69.4%). There were no significant differences in the pure-tone threshold, properties of ABR waves, and vHIT gain. There was no evidence of cochleovestibular nerve compression syndrome in all patients. The angulation of the nerve by the offending vessel was more frequently identified in the HFS side than in the unaffected side (p = 0.040). The effect of HFS on cochleovestibular nerve function is limited.
半面痉挛（HFS）是一种由后颅窝面神经血管压迫引起的运动障碍。耳蜗前庭神经靠近面神经，且与面神经共用进入外周的通道，也会出现由血管压迫导致的功能紊乱。基于导致HFS的血管压迫也可能影响附近耳蜗前庭神经功能这一假设，我们对HFS患者的耳蜗前庭神经功能进行了评估。回顾性分析了49例经手术确诊为HFS患者的病历。分析了纯音听阈、听性脑干反应（ABR）、视频头脉冲试验（vHIT）及磁共振成像的结果。对每位患者的HFS侧和未受影响侧进行配对比较。小脑前下动脉是主要的责任血管（69.4%）。纯音听阈、ABR波特性及vHIT增益方面均无显著差异。所有患者均无耳蜗前庭神经压迫综合征的证据。责任血管对神经的成角情况在HFS侧比未受影响侧更常见（p = 0.040）。HFS对耳蜗前庭神经功能的影响有限。
