Huntington's Disease (HD) is an inherited progressive neurodegenerative disorder. Although onset of Huntington's Disease usually occurs in adulthood, the age of onset of the condition is extremely variable with approximately 5-10% of cases having an onset of less than 20 years, or Juvenile Huntington's Disease (JHD). While JHD shares many of the clinical features of adult HD (e.g., chorea and personality disorders), patients with JHD often experience...