Abstract
Kim et al.1 considered an important question in acute vestibular neuritis (VN). We would like to address a few issues. First, the authors pointed out that such a study had not been previously published. However, a clinical trial was published in Neurology ® in which the normalization of a displacement of the subjective visual vertical, ocular torsion, and postural imbalance was evaluated in 39 patients with acute VN over a period of 4 weeks.2 However, in this study, all patients had a persistent peripheral vestibular deficit and the values normalized within this period. Second, it is well known that dynamic deficits of the vestibular ocular reflex, which can be detected by the head impulse test, often persist in VN. However, caloric response may normalize3 because dynamic deficits are not centrally compensated. This is not true for static deficits, such as a displacement of the subjective visual vertical or ocular torsion. …
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