Movement disorders are commonly neurological, involving both voluntary and involuntary abnormal, reduced or slowed movement. Ataxia affects the cerebellum, the brain’s coordination centre, causing uncoordinated, clumsy balance and limb movements as well as impaired speech. Dystonia involves sustained involuntary muscle contractions with twisting, repetitive movements. Myoclonus muscle jerks can be lightning-quick, effecting either a single muscle or a whole group of muscles. Chorea is characterized by repetitive, brief, irregular rapid, involuntary movements commonly of the face, mouth, trunk and limbs. HCD Economics has already conducted a large Burden of Illness Study of Huntington’s Chorea, one of the most well know genetic diseases.