<qa>  What is the name of the study that will be used to compare the patients fine motor skillsThis study tests a novel method devised for quantifying change in musical performance based on musical instrument digital interface MIDI data that will be able to directly rate or score changes in musical output. MIDI data include information on the note played, the time of onset, note duration, and note loudness. Note duration and loudness will be used in this study. It will be a quantitative, objective computerized evaluation that compares the patients fine motor skills before and after treatment with Myobloc . It will be one of the first quantitative analyses of musical ability of its kind and could significantly impact the way musicians determine the efficacy of botulinum toxin treatment. 