Modulation of postural control based on postural set. Boxplot central mark indicates median, and bottom and top edges indicate 25th and 75th percentiles, respectively. Whiskers extend to extreme data that are not outliers. Open circles are outliers. *Abbreviations: pHD, Premanifest Huntington’s disease; mHD, Manifest Huntington’s disease; AP, Anteroposterior p-value: *: <0.05; **: <0.001