Under each condition of movement, the consistency of the recorded patterns of kinematics and EMG data will be compared between the three groups of patients. Regarding secondary dystonia, whenever relevant, we will also correlate the observed patterns with existing cerebral lesions. We will attempt to find further connections between the clinical phenotype of the patients and the measured movement parameters. For example, the kinematics and EMG data will be put into relation to the main types of symptoms displayed by the patients (mobile vs. fixed dystonia), and the distribution of the symptoms.