The role of vertical semicircular canal function in the vertical component of skull vibration-induced nystagmus. (31st July 2020)

• Record Type: Journal Article
• Authors: Matos, Ricardo; Navarro, Marta; Pérez-Guillén, Vanesa; Pérez-Garrigues, Herminio
• Is Part Of: Acta oto-laryngologica. Volume 140:Number 8(2020)
• Page Start: 639
• Page End: 645
• Publication Date: 2020-07-31
• Subjects: Skull vibration-induced nystagmus -- vertical component -- vertical semicircular canal; Otolaryngology -- Periodicals; Ear -- Diseases -- Periodicals; Throat -- Diseases -- Periodicals; Otolaryngology -- Electronic Resources; Otorhinolaryngologic Diseases; 617.8
• DOI: 10.1080/00016489.2020.1751877
• Languages: English
• ISSNs: 0001-6489

Abstract

Abstract: Background: Generally, vertical component of the skull vibratory nystagmus (VCN) is ignored in the clinical practise. Thus, the relative contribution of the vestibular organs in the presence of VCN remains unknown. Objectives: To determine the association between vertical semicircular canal (vSCC) function and the presence of VCN. Material and methods: Comparisons were made between Video Head Impulse Test and SVINT (100 Hz) results at the time of the acute peripheral vestibular lesion (PVL) and at the post-acute phase in patients diagnosed PVL. Later on, a paired analysis was performed restricting the assessments to patients with vestibular explorations in both the acute and post-acute phases. Results: In an univariable analysis, larger mean total gain differences (TGD) between vSCC VOR gains, significantly related with the appearance of VCN in nystagmography in the acute phase ( p = .001), unlike the post-acute phase ( p = .46). After a multivariate analysis, mean TGD was the only predictive factor of the VCN ( p = .013). In the paired analysis, we found an increase in the post-acute phase mean TGD, approaching zero value. Conclusions and significance: Global relation between all vertical canals has at least a contributory role in the presence of the vertical component of nystagmus in SVINT.