Table of Contents
ISRN Anatomy
Volume 2013 (2013), Article ID 158341, 4 pages
http://dx.doi.org/10.5402/2013/158341
Research Article

Occurrence of Metopism in Dry Crania of Adult Brazilians

1Faculdade Integrada Tiradentes (FITS), Avenida Comendador Gustavo Paiva 5017, Cruz das Almas, 57038-000 Maceió, AL, Brazil
2Centro Universitário (Cesmac), Rua Cônego Machado, 918 Farol, 57051-160 Maceió, AL, Brazil
3Universidade Federal de Alagoas, ICBS/UFAL, Praça Afrânio Jorge s/n, Prado, 57010-020 Maceió, AL, Brazil
4Departamento de Morfologia, Cidade Universitária Professor José Aloísio de Campos, Avenida Marechal Rondon, s/n Jardim Rosa Elze, 49100-000 São Cristovão, SE, Brazil

Received 21 June 2013; Accepted 12 July 2013

Academic Editors: J. E. Alvernia, C. Kopuz, and T. Yamaguchi

Copyright © 2013 Ivan do Nascimento da Silva et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The metopic suture is located between the tubercles of the frontal bone. There are divergences regarding the exact time at which it closes, which ranges from the first to the tenth year of life, although it may persist into adulthood. This study was conducted on 134 dry crania from adult Brazilians, of which 95 were male and 39 were female. These were available in the anatomy laboratories of higher education institutions in Maceió, AL, Brazil. All the crania were examined macroscopically with regard to the presence (metopism: M) on absence of the metopic suture. M was considered to be complete (Mc) when it continued uninterruptedly from the nasium to the bregma and incomplete (Mi) when it was not present over its entire length. It was observed that Mc was present in 4.48% (6/134) of the skull examined, of which 50% (3/134) were male and 50% (3/134) were female. An incomplete metopic suture was found in 5.22% (7/144) of the crania and more frequently among males (3.73%; 5/134). Among the crania with a metopic suture, the dolichocephalic type predominated (7.46%) in relation to brachycephalic crania (1.49%) and mesocephalic crania (0.74%). There was no predominance of metopism between the sexes, while an incomplete metopic suture was slightly more common among males.