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Brushing ratings. During the fMRI task, slow (3 cm/s) and fast brushing (30 cm/s) stimuli were delivered to the palm and back of the left hand. Each block of 8 stimuli was rated on a visual analog scale for intensity (0 = “no sensation”; 100 = “the most intense sensation imaginable”) and for pleasantness (0 = “the most unpleasant imaginable”; 100 = “the most pleasant imaginable”). Error bars indicate ± SEM.
