科研之友
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摘要
The mastoid process characteristics are of great utility in the diagnosis of sex. De Paiva %26 Segre (2003) described that sex diagnosis was possible based on the determination of the 芍rea of the triangle formed by the points porion, mastoidale, and asterion. The purpose of this study was to determine the existence of sexual dimorphism in the dimensions and the 芍rea of the mastoid triangle using statistical and discriminant function analysis. A total of 81 skulls of Brazilian individu芍is that were part of the Museum of the Federal University of Sao Paulo (UNIFESP) collection were used, with sex and ages known: 50 men and 31 women between 40 and 70 years of age (mean 51.58 years, SD 7.319). Most of the lineal dimensions and the calculated 芍reas were higher in men than in women. Only the distance porion-mastoidale, the 芍rea of the right mastoid triangle and the total 芍rea, was higher and more significant in men with p %26lt; 0.01. The analysis of the discriminant function showed that the group of analyzed lineal dimensions presents a low discriminant capacity (Lambda of Wilks = 0.960, Canonical Correlation = 0.199); only porion-mastoidale allowed one to distinguish men%26apos;s groups from women with a general accuracy of 64.2%, but with a high sensibility to classify men (93%) and a very low sensibility for women (17.7%). These results indicate that the determination of sex based on the dimensions of the mastoid triangle leads to underestimate the women, henee being of less utility in practice. Las caracter赤sticas del proceso mastoides son de gran utilidad para el diagn車stico del sexo. De Paiva %26 Segre (2003) describieron que era posible el diagn車stico del sexo, en base a la determinaci車n del 芍rea del tri芍ngulo formado entre los puntos porion, mastoidale y asterion. El prop車sito de este estudio fue determinar la existencia de dimorfismo sexual en las dimensiones y el 芍rea del tri芍ngulo mastoideo, mediante an芍lisis estad赤stico y de funci車n discriminante. Se utilizaron 81 cr芍neos de individuos Brasile os, pertenecientes a la colecci車n de la UNIFESP, de sexo y edad conocidos, 50 hombres y 31 mujeres, de entre 40 y 70 a os (media 51.58 a os, DS 7.319). La mayor赤a de las dimensiones lineales y las 芍reas calculadas fueron mayores en hombres que en mujeres. S車lo la distancia porion-mastoidale (Po-Ma), el 芍rea del tri芍ngulo mastoideo derecho y el 芍rea total resultaron mayores y significativas en hombres con p%26lt;0.01. El an芍lisis de la funci車n discriminante mostr車 que el conjunto de dimensiones lineales analizadas presenta un bajo poder discriminante (Lambda de Wilks= 0.960, Cor
