| Phenotype details |
see paper; cervical/axial dystonia at rest, writer’s cramp, action-induced foot dystonia with walking, myoclonic jerks legs/arms, increasing with action, positive effect of alcohol on jerks, complaints of hyperventilation or panic attacks; high-frequency continuous myoclonus legs while standing, causing unsteadiness; 3/5 cases cardiac arrhythmias, attacks of painful cramps upper/lower limbs |