• Luigi Cattaneo, Elisabetta Chierici, and Giovanni Pavesi.
• Dipartimento di Neuroscienze, Sezione di Neurologia, Università degli Studi di Parma, Via Gramsci 14, 43100 Parma, Italy. luigi.cattaneo@nemo.unipr.it
• Clin Neurophysiol. 2005 Oct 1;116(10):2348-53.

ObjectiveWe describe the case of a woman with Bell's Palsy-induced blepharospasm (BPIB) of the right eye that appeared simultaneously with a complete left facial nerve palsy. The involuntary spasm was relieved by passive lowering of the upper eyelid on the paretic side.MethodsThe recovery curve of the blink reflex was evaluated on the non-paretic side in baseline conditions, after subcutaneous apomorphine and placebo administration and 8 months later, at recovery from the palsy.ResultsWe found increased recovery of the test-R2 responses at short interstimulus intervals at baseline, which was normalised by apomorphine but not by placebo. At recovery the blink reflex R2 recovery curve returned to normal.ConclusionsThis report demonstrates for the first time a response of BPIB to a dopamine agonist.SignificanceOur findings are in agreement with an animal model of blepharospasm that suggests a combined role of weakness of the orbicularis oculi muscle and a dysfunction of the dopaminergic system in the pathogenesis of this disorder.

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