Table A: Children with dystonia. Subject ID; Sex [M: Male; F: Female]; Age [years]; Deep Brain Stimulation (DBS) [Y: yes; N: no]; Diagnosis; Severity of dominant arm (DArm), and Total Score (scores averaged over two raters are based on the Barry-Albright Dystonia Scale (Barry et al., 1999); for each segment the score ranges from 0 - absence of dystonia - to 4 - severe dystonia); Dominant arm; Medications. [*Total Score NOT available]. Table B: Control children. Subject ID; Sex; Age [years]; Dominant arm