The dance of Saint Guy or St. Vitus' Dance, a neurological disorder. In the 16th century, some Germans believed they would obtain good health for a year by dancing before statue of St. Vitus on feast day. This dancing became popular and the name "Saint Vitus' Dance" was given to the neurological disorder Sydenham's chorea, a disease characterized by rapid, uncoordinated jerking movements affecting primarily the face, feet and hands. This condition is exhibited by the afflicted people in this image. Lithograph from C. Aubry's "Album comique de pathologie pittoresque" (Comical album of picturesque pathologies).