Myoclonus Dystonia is in most cases caused by loss-of-function-mutations in the epsilon sarcoglycan gene (SGCE).
The field of Movement Disorders includes the following areas: Parkinson's disease and parkinsonism, ataxia, dystonia, chorea and Huntington's disease, tics and Tourette syndrome, myoclonus and startle, restless leg syndrome, stiff person syndrome, tremor and essential tremor, and gait disorders.