The objective of this study was to determine the prevalence of blepharospasm (BSP), with and without apraxia of eyelid opening (AEO), in patients with parkinsonism, cervical dystonia (CD), and essential tremor (ET). BSP, with or without AEO, is associated with parkinsonism. There have been several reports of BSP in other dystonic conditions, but few looked at the incidence of BSP in ET patients. This study included 659 patients of which 357 had parkinsonism (276 idiopathic Parkinson’s disease (IPD) and 81 atypical parkinsonism (57 progressive supranuclear palsy; 11 multiple system atrophy 13 corticobasal degeneration)), 274 had ET, 22 had CD, and 6 had spinocerebellar ataxia. Our results indicate that BSP (with or without AEO) was more prevalent in atypical parkinsonism (6 out of 81, 7.41%) than IPD (9 out of 276, 3.26%). The study also followed 10 (of the 28) patients with BSP to screen for the development of other movement disorders – of these, 2 developed Parkinson’s disease. We conclude then that BSP is common in parkinsonism and that BSP is more prevalent in atypical parkinsonism. We also conclude that BSP is not a common feature in ET patients (0 out of 274 patients reported BSP symptoms).

Keywords:
Blepharospasm, Spinocerebellar ataxia, Essential tremor, Parkinsonism, Cervical dystonia
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© 2012 S. Karger AG, Basel
2012
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