Persistence of perilymph fistula mechanism in a completely paretic posterior semicircular canal.
case_report · Level V
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- Record sourced from PubMed, PMID 15654053.
- Also identified by PMC identifier 1739499.
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Abstract
The three dimensional eye movements (search coil technique) of a patient with a completely paretic left posterior semicircular canal as a result of a perilymph fistula (PLF) were studied. The patient still exhibited pressure induced nystagmus that obeyed Ewald's first law. This finding cannot be explained by otolith stimulation, but might indicate that PLF mechanisms either persist in canal plugging or act on the ampulla by directly deflecting the cupula.
Medical subject headings
- Cochlear Aqueduct
- Fistula
- Ocular Motility Disorders
- Semicircular Canals