Snapshot A 53-year-old man presents with involuntary jerking movement of the arms. This is worsened with voluntary movement and appears to be nonrepetitive. He tries to incorporate these movements into voluntary movement. He states that this is negatively affecting his quality of life, as he has difficulty with activities of daily living. Family history is significant for Huntington's disease in the father. On physical examination, there is impaired fine motor movements and choreiform movement of the upper extremity. He is started on tetrabenazine. Introduction Huntington's disease (HD) login to view 9 more bullets Medications login to view 13 more bullets