| Inheritance | Autosomal dominant |
| Gene | *JPH3* (Junctophilin-3) |
| Chromosomal location | 16q24.3 |
| Chorea | Jerky, involuntary movements (present in ~90%) |
| Dystonia | Sustained muscle contractions (60-70%) |
| Parkinsonism | Bradykinesia, rigidity (30-40%) |
| Ataxia | Coordination difficulties (20-30%) |
| Databases | OMIMOrphanetClinicalTrialsPubMed |
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