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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.

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