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Auditory brain-stem responses in blepharospasm |
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| Institution: | 2. Veterans Affairs Medical Center and Department of Ophthalmology, University of Utah Medical Center, Salt Lake City, UT USA;1. Bethesda Eye Institute and Department of Otolaryngology, St. Louis University, MO USA;1. School of Physics and Astronomy, University of Minnesota, Minneapolis, MN 55455, United States;2. Fine Theoretical Physics Institute, University of Minnesota, Minneapolis, MN 55455, United States;3. Centro de Estudios Científicos (CECs), Casilla 1469, Valdivia, Chile |
| Abstract: | The auditory brain-stem response (ABR) has been reported to detect abnormalities in both the auditory pathways and in adjacent structures. Ten of 35 consecutive patients with blepharospasm were found to have abnormal ABRs involving poor form and delayed peak latency of positive components III or V. Abnormal ABRs in approximately 30% of patients with essential blepharospasm suggest pathology in the brain-stem of a substantial proportion of patients with this form of cranial-cervical dystonia. |
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