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The diagnosis of adult-onset primary dystonia (AOPD) is mainly clinical, but requires the exclusion of any secondary causes. AOPD is characterised by sustained involuntary muscle contraction resulting in one or more body parts moved away from their neutral position. No other neurological sign is observed, apart from tremor. The 1998 Movement Disorder Society Consensus on Tremor states indeed that tremor and dystonia can be associated, defining the tremor affecting a dystonic body part as ‘dystonic tremor’, and the tremor affecting a non-dystonic body part as ‘tremor associated …
Correction notice This letter has been amended since it was published Online First. The affiliation for Susanne A Schneider was incorrect and this has now been changed.
Contributors RE: assessing the patients, writing the first draft. SAS, NPQ and KPB: assessing the patients, reviewing the paper.
Competing interests None.
Patient consent Obtained.
Provenance and peer review Not commissioned; externally peer reviewed.
▸ Additional material is published online only. To view please visit the journal online (http://dx.doi.org/10.1136/jnnp-2012-304779).
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