RGD uses the Human Disease Ontology (DO, https://disease-ontology.org/) for disease curation across species. RGD automatically downloads each new release of the ontology on a monthly basis. Some additional terms which are required for RGD's curation purposes but are not currently covered in the official version of DO have been added. As corresponding terms are added to DO, these custom terms are retired and the DO terms substituted in existing annotations and subsequently used for curation.
A focal dystonia that is characterized by simultaneous contraction of the agonist and antagonist muscles that control the position of the head contracting during dystonic movement which causes the neck to involuntarily turn to the left, right, upwards, and/or downwards. (DO)