Huntington's isease, also called Huntington's chorea, chorea major, or HD, is a genetic neurological disorder characterized by abnormal body movements called chorea and a lack of coordination; it also affects a number of mental abilities and some aspects of behavior. The name is derived from the physician George Huntington who described the disorder in 1872. In 1993 the gene causing HD was found, making it one of the first inherited genetic disorders for which an accurate test could be performed. Because of this, and the disorder having aspects applicable to other neurological disorders such as Alzheimer's disease, it has been extensively researched since then.