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Multiple sclerosis (MS) is an inflammatory, demyelinating disease that can affect several areas of the central nervous system. Damage along the auditory pathway can alter its integrity significantly. Therefore, it is important to investigate the auditory pathway, from the brainstem to the cortex, in individuals with MS. OBJECTIVE: The aim of this study was to characterize auditory evoked potentials in adults with MS of the remittent-recurrent type. METHOD: The study comprised 25 individuals with MS, between 25 and 55 years, and 25 age- and gender-matched healthy controls (research and control groups). Subjects underwent audiological and electrophysiological evaluations. RESULTS: Statistically significant differences were observed between the groups regarding the results of the auditory brainstem response and the latency of the Na and P300 waves. CONCLUSION: Individuals with MS present abnormalities in auditory evoked potentials indicating dysfunction of different regions of the central auditory nervous system.A esclerose múltipla é uma doença inflamatória desmielinizante que pode se desenvolver em diversas regiões do sistema nervoso central. O comprometimento da via auditiva central pode alterar significativamente a integridade desta e, portanto, a investigação desta região em indivíduos com esclerose múltipla, desde o tronco encefálico até o córtex, torna-se importante. OBJETIVO: Caracterizar os resultados dos potenciais evocados auditivos em adultos com esclerose múltipla do tipo remitente-recorrente. MÉTODO: Foram submetidos às avaliações audiológica e eletrofisiológica 25 indivíduos pertencentes ao grupo controle e 25 ao grupo pesquisa, com idades entre 25 e 55 anos. RESULTADOS: Verificou-se diferença estatisticamente significante entre os grupos quanto à ocorrência de resultados normais e alterados no potencial evocado auditivo de tronco encefálico e latências das ondas Na e P300. CONCLUSÃO: Indivíduos com esclerose múltipla apresentam alterações nos potenciais evocados auditivos, indicando comprometimento de diferentes regiões do sistema nervoso auditivo central.

OBJETIVO: Analisar os potenciais evocados auditivos de tronco encefálico em usuários de crack e múltiplas drogas, bem como levantar as possíveis queixas auditivas e de equilíbrio nesta população. MÉTODOS: Foram avaliados 40 usuários de drogas (20 com uso há mais de cinco anos e 20 há menos de cinco anos) e 20 não usuários, do sexo masculino, com idades entre 19 e 46 anos, com limiares auditivos dentro da normalidade. RESULTADOS: Não houve diferenças significativas dos potenciais evocados auditivos de tronco encefálico dos usuários de drogas quando comparados ao grupo controle. CONCLUSÃO: Os potenciais evocados auditivos de tronco encefálico dos usuários de drogas não diferiram significantemente do grupo controle. As queixas apresentadas pelos usuários de drogas foram hiperacusia, alucinação auditiva, zumbido e alteração de equilíbrio.PURPOSE: To study the findings of auditory brainstem evoked potentials in crack and multiple drugs users, as well as to raise possible auditory and balance complaints in this population. METHODS: A total of 40 drugs addicts (20 who had been using drugs for over five years and 20 for less than five years) and 20 non-users were evaluated. Subjects were all male, with ages ranging from 19 to 46 years, and had auditory thresholds within normal. RESULTS: No significant statistical differences were found regarding the auditory brainstem evoked potentials findings of the addicts group, when compared to the non-users. CONCLUSION: Auditory brainstem evoked potentials in crack and multiple drugs users did not differ significantly from the control group. Complaints presented by drugs addicts were hyperacusis, auditory hallucination, tinnitus and altered balance.

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Introduction: In patients with multiple sclerosis among other symptoms occur cognitive dysfunctions, which can be shown by P300 wave changes., Goal: The aim of this study was to demonstrate that patients with multiple sclerosis have reduced amplitude and prolonged latency, longer than 300 ± 10 ms., Methods: The study included group of patients with multiple sclerosis and control group. After reviewing the medical records both groups of 14 participants were subjected to the same testing procedures auditory cognitive potentials (P300)., Results: We have shown that patients with multiple sclerosis don't have prolonged P300 target stimulus latency, but they have a longer P300 frequent stimulus latency for 18 ms. From 14 patients seven had a pathological P300 target stimulus amplitude, and even 12 patient had pathological P300 frequent stimulus amplitude., Conclusion: People with multiple sclerosis have altered P300 which indicates the presence of cognitive dysfunction in these patients.