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Revista Brasileira de Otorrinolaringologia
Print version ISSN 0034-7299
LIMA, Tania Mara Assis et al. Alterations in early auditory evoked potentials in multiple sclerosis patients. Rev. Bras. Otorrinolaringol. [online]. 2009, vol.75, n.2, pp.177-181. ISSN 0034-7299. http://dx.doi.org/10.1590/S0034-72992009000200004.
Alterations in early auditory evoked potentials (EAEP) in individuals with demyelinating disease are suggestive of lesions in the brainstem. AIM: this study aims to evaluate the prevalence of hearing disorders and altered EAEP in multiple sclerosis (MS) patients. MATERIALS AND METHOD: sixteen female and nine male patients with a defined diagnosis of multiple sclerosis took part in this study. All individuals underwent hearing and EAEP tests. The wave forms were categorized according to Jerger (1986). RESULTS: fifty EAEP tests were carried out; 70% were classified as type I (normal response) according to Jerger's criteria. Altered EAEP results in at least one ear were classified into types II, III, IV or V according to Jerger. Females accounted for 31.25% of alterations, and males 44.44%, adding up to 36% of all cases. CONCLUSIONS: these findings stress the importance of looking at EAEP in cases where there is suspicion of demyelinating disease and in patients with a defined diagnosis for MS.
Keywords : multiple sclerosis; auditory evoked potentials; brainstem.