Figure 2.
Correlation between bucket test scores and tap-evoked oVEMP n1 amplitude asymmetry ratio in study subjects. A leftward rotation of the bucket score (scored negatively on the x-axis) indicates a relative left-sided utricular weakness; this corresponds to a positive oVEMP asymmetry ratio and indicates greater utricular activity on the right compared with the left side. The reverse is true for a rightward rotation of the bucket score. Grey boxes indicate quadrants of concordance in lesion laterality as measured by the bucket test and oVEMP. There is a significant linear correlation (p = 0.04) between bucket scores and tap-evoked oVEMP asymmetry ratio (AR).