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| Nocturnal Paroxysmal Dystonia Dystonia, Nocturnal, Paroxysmal | Hypnogenic Paroxysmal Dystonia | Sleep-Related Dystonia | Dystonia, Hypnogenic Paroxysmal | Dystonia, Nocturnal Paroxysmal | Dystonia, Sleep-Related | Dystonias, Hypnogenic Paroxysmal | Sleep Related Dystonia A parasomnia characterized by paroxysmal episodes of choreoathetotic, ballistic, dystonic movements, and semipurposeful activity. The episodes occur during non-rapid eye movement sleep and typically recur several times per night. (Neurology 1992 Jul;42(7 Suppl 6):61-67; Adams et al., Principles of Neurology, 6th ed, p391) |