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. 2020 Oct 15;11:578588. doi: 10.3389/fneur.2020.578588

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Copyright © 2020 Castellucci, Malara, Martellucci, Botti, Delmonte, Quaglieri, Rebecchi, Armato, Ralli, Manfrin, Ghidini and Asprella Libonati.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Box plots correlating medians of VOR-gain values at presentation and following physical therapy for the affected SC among overall 53 subjects with identified pathologic canal divided according to pDBN duration (A) and affected SC function (B). Horizontal dashed lines represent the border between normal and pathologic VOR-gain values for vertical canals (0.7) and values within gray areas represent abnormal measurements. Statistically significant differences at the Wilcoxon signed-rank test are shown. p < 0.05 and < 0.01 are marked with * and **, respectively. pDBN, positional downbeat nystagmus; post, post-treatment; pre, at presentation; SC, semicircular canal; VOR, vestibulo-ocular reflex. Values at a greater distance from the median than 1.5 times the IQR are plotted individually as dots (weak outliers).