Valence in controls: ****neutral vs pleasant and unpleasant p<0.0001. Valence in HD patients: ++++neutral vs pleasant and unpleasant p<0.0001. Arousal in controls: *unpleasant vs neutral p<0.05; ****pleasant vs neutral p<0.0001 Arousal in HD patients: ++++ unpleasant vs neutral p<0.0001; ++++pleasant vs controls p<0.0001.

Figure 1: Mean values and standard deviations of valence and arousal scores attribute by Huntington’s disease patients (HD: n° 16) and controls (n° 16) to affective pictures, on the basis of their normative category. Results of Bonferroni test in the single groups are shown.