RESUMEN
UNLABELLED: The presence of middle-latency evoked auditory potentials allows for integrity evaluation of both peripheral and the central auditory systems, and also, that of the nucleus and auditory pathways of sub-cortical region. They have also been used to study alterations of these structures in different neurological diseases. AIMS: the aim of this study is to verify the latency of the middle-latency evoked auditory potentials and detect the presence of any deflections in subjects with neurological diseases. MATERIALS AND METHODS: In a clinical and prospective trial, 20 patients having central neurological diseases of various etiologies were evaluated and, positive and negative deflections produced by the middle-latency evoked auditory potentials in these patients were analyzed. RESULTS: Data was statistically analyzed and showed significant modifications in middle-latency evoked auditory potentials. CONCLUSION: The authors concluded that patients with neurological disorders have either wave suppression or enlarged latency periods in relation to normal subjects.
Asunto(s)
Potenciales Evocados Auditivos/fisiología , Enfermedades del Sistema Nervioso/fisiopatología , Tiempo de Reacción/fisiología , Estimulación Acústica , Estudios de Cohortes , Humanos , Estudios Prospectivos , Estándares de ReferenciaRESUMEN
A presença das respostas auditivas evocadas de latência média permite-nos a avaliação da integridade do sistema auditivo periférico e central, incluindo os núcleos e vias auditivas existentes até ao nível da região subcortical. Desta forma, elas têm sido usadas para o estudo das alterações ocorridas em diferentes doenças neurológicas. OBJETIVOS: Verificar os valores dos períodos de latências destas respostas e detectar a presença das deflexões. CASUíSTICA E MÉTODO: Foram avaliados 20 pacientes portadores de doenças neurológicas existentes ao nível central, de diferentes etiologias, sendo analisadas as várias deflexões, positivas e negativas, geradas pelos potenciais auditivos evocados de latência média. Os sujeitos da pesquisa foram escolhidos por conveniência e os dados coletados foram avaliados levando-se em consideração a relação interindivíduos. FORMA DE ESTUDO: Foi adotado o estudo de Coorte, com avaliação contemporânea. RESULTADOS: Foram analisados estatisticamente e mostram alterações significativas da respostas evocadas de latência média em pacientes neurológicos. CONCLUSÃO: Nesses pacientes ou havia supressão das deflexões estudadas ou suas latências estavam aumentadas, quando comparadas com os padrões normais.
The presence of middle-latency evoked auditory potentials allows for integrity evaluation of both peripheral and the central auditory systems, and also, that of the nucleus and auditory pathways of sub-cortical region. They have also been used to study alterations of these structures in different neurological diseases. AIMS: the aim of this study is to verify the latency of the middle-latency evoked auditory potentials and detect the presence of any deflections in subjects with neurological diseases. MATERIALS AND METHODS: In a clinical and prospective trial, 20 patients having central neurological diseases of various etiologies were evaluated and, positive and negative deflections produced by the middle-latency evoked auditory potentials in these patients were analyzed. RESULTS: Data was statistically analyzed and showed significant modifications in middle-latency evoked auditory potentials. CONCLUSION: The authors concluded that patients with neurological disorders have either wave suppression or enlarged latency periods in relation to normal subjects.