A major locus for several phenotypes of myoclonus--dystonia on chromosome 7q.

Abstract excerpt

Myoclonus--dystonia is a genetically heterogeneous autosomal dominant disorder caused by a mutation in the D2 dopamine receptor on chromosome 11 and a locus on chromosome 7q21-q31. The authors tested linkage to the chromosome 7q candidate region in four families with either myoclonic dystonia (n = 3) or essential myoclonus (n = 1). Age at onset ranged from 0.5 to 38 years. Only four patients from two families had...

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