RESUMO -Foram dissecados com auxílio de microscópio cirúrgico 12 ângulos ponto-cerebelares em cadáveres de adultos. Os seguintes parâmetros foram analisados: dimensões anteroposterior (horizontal) e súpero-inferior (vertical) do meato acústico interno ( M A I ) . Além dessas dimensões foram determinadas suas distâncias para as seguintes estruturas: cavum de Meckel, forame jugular superior e inferior (CM, FJS e FJI, respectivamente). Foi utilizada fórmula matemática para o cálculo da área do meato acústico interno. Este estudo contribui para melhor compreensão da microneuroanatomiia do ângulo ponto-cerebelar e parâmetros morfométri-cos ósseos associados, em indivíduos brasileiros. P A L A V R A S -C H A V E : meato acústico interno, ângulo ponto-cerebelar, niicroanatomia. Microanatomy of cerebello-pontine angle is Brazilian specimens with special remarks on the internal acoustic meatusSUMMARY -Twelve cerebello-pontine angles of the corpses of six adults were dissected with the aid of a surgical microscope. The following parameters were analyzed: the superior-inferior (vertical) and the anterior-posterior (horizontal) dimensions of the internal acoustic meatus ( I A M ) ; and the distances from the I A M to the Meckel's cave, the superior jugular foramen (SJF) and the inferior jugular foramen ( I J F ) . W e used a mathematical formula to calculate the area of the I A M . Important variations in the IAM's measurements were found, main'ly concerning its area. This study contributes to a better understanding of cerebello-pontine angle ( C P A ) structures and their relaionships wih osseous parameters in Brazilian individuals. O objetivo do presente estudo é estabelecer medidas morfométricas do meato acústico interno, contribuindo, deste modo, para a melhor compreensão da microneuroanatomia dessa região.
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