Manzari Leonardo, Burgess Ann M, MacDougall Hamish G, Curthoys Ian S
MSA ENT Academy Center Cassino, Italy.
Acta Otolaryngol. 2011 Jan;131(1):107-12. doi: 10.3109/00016489.2010.507780. Epub 2010 Sep 23.
The enhanced sound- and vibration-induced vestibular evoked myogenic potentials (VEMPs) and their lower threshold in patients with a thinning of the bony wall of the superior semicircular canal (superior canal dehiscence, SCD) have been interpreted as being due to the dehiscence allowing sound and vibration to activate, unusually, the receptors of the dehiscent semicircular canal. We report a patient with bilateral SCD, as verified by high resolution CT scans, who had bilaterally decreased superior semicircular canal function, as shown by rotational tests of canal function. This patient also showed enhanced VEMPs and reduced thresholds. We conclude that in this patient the enhanced VEMP responses are thus probably due to enhanced otolithic stimulation by sound and vibration after dehiscence.
在患有上半规管骨壁变薄（上半规管裂，SCD）的患者中，声音和振动诱发的前庭诱发肌源性电位（VEMPs）增强且阈值降低，这被解释为是由于骨壁裂开使得声音和振动异常地激活了裂开的半规管的感受器。我们报告了一名经高分辨率CT扫描证实患有双侧SCD的患者，通过半规管功能的旋转试验显示其双侧上半规管功能减退。该患者还表现出VEMPs增强和阈值降低。我们得出结论，在该患者中，VEMP反应增强可能是由于裂开后声音和振动对半规管耳石的刺激增强所致。
