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[Metopism in Brazilians].

M del Sol, O Binvignat, P D Bolini

Revista Paulista De Medicina

|March 1, 1989

Summary

Metopism, the persistence of the metopic suture, was found in 2.75% of Brazilian adult skulls. Incomplete metopic sutures were more common, affecting 28.75% of individuals, primarily in a linear form.

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Area of Science:

Anthropology
Anatomy
Forensic Science

Background:

The metopic suture, a remnant of the frontal bone's bipartite development, typically fuses by the second year of life.
Persistence of this suture, known as metopism, and incomplete fusion are variations observed in adult human skulls.
Understanding the prevalence and morphology of metopic sutures is crucial for anatomical and forensic studies.

Purpose of the Study:

To investigate the prevalence and morphological characteristics of metopism and incomplete metopic sutures in a Brazilian population.
To provide data relevant to anatomical variations and their potential implications in forensic contexts.

Main Methods:

Analysis of 400 dry adult skulls (135 female, 265 male) from anatomical collections at the University of São Paulo.
Systematic observation and recording of the presence and form of metopic sutures.

Main Results:

Metopism was identified in 11 skulls (2.75%), with a slightly higher prevalence in males (7 males, 4 females).
Incomplete metopic sutures were observed in 115 skulls (28.75%), predominantly in males (88 males, 27 females).
The linear form was the most common type of incomplete metopic suture, accounting for 64.35% of cases.

Conclusions:

Metopism and incomplete metopic sutures represent notable anatomical variations in the studied Brazilian population.
The findings highlight the importance of considering metopic suture presence in interpretations of skull morphology, particularly in forensic investigations involving skull fractures.

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