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 muscle tissue disease characterized by electrically silent contractions of the skeletal muscles in response to mechanical stimuli. It has_material_basis_in mutation in the gene localized to 1q41 at the distal end of the long arm of chromosome 1, has_symptom characteristic lateral rolling movement of muscle, has_symptom muscle cramps, has_symptom muscle pain, has_symptom muscle stiffness during or following exercise. (DO)