Fig. 4

Correlations between scores of the behavior tests and cVEMP results. a–c Correlations of a rotarod test score [latency until slipping on the rod, seconds (sec)], b beam crossing test score [time to traverse the beam, seconds (sec)], and c air-righting reflex test score [latency until righting reflex, milliseconds (msec)] with cVEMP amplitude [microvolts (μV), left graphs] and VEMP latency (msec, right graphs) are shown. Triplicated measurements for each test with a total of 10 mice including 5 mice for the control group and 5 mice for the IDPN group were performed. Spearman’s rank correlation coefficients and significance differences (*p < 0.05) were analyzed for a rotarod vs. cVEMP amplitude [r = 0.6239, p = 0.0002] and cVEMP latency [r = − 0.2352, p = 0.2109], b beam vs. cVEMP amplitude [r = − 0.8011, p < 0.0001] and cVEMP latency [r = 0.3808, p = 0.0379], and c air-righting reflex vs. cVEMP amplitude [r = − 0.42806, p = 0.0065] and cVEMP latency [r = 0.3844, p = 0.0360]