Blepharoclonus in Parkinsonism: Frequency and Diagnostic Utility
This prospective study assessed the prevalence of blepharoclonus (eyelid fluttering) in 75 Parkinson's disease patients and 10 with atypical parkinsonism, finding it present in 84% of PD cases and 60% of synucleinopathy cases but absent in non-synucleinopathy parkinsonian syndromes. The findings suggest blepharoclonus may have diagnostic utility in differentiating synucleinopathy-associated parkinsonism from other parkinsonian conditions.