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Evaluating sexual dimorphism in the human mastoid process: A viewpoint on the methodology
Anja Petaros1, Sabrina B Sholts2, Mario Slaus3
1Department of Forensic Medicine and Criminalistics, Rijeka University, School of Medicine, Rijeka, Croatia.
Summary
The mastoid process is a key human skull feature for determining biological sex in skeletons. Current methods for analyzing its sexual dimorphism are insufficient, necessitating improved and standardized approaches.
Area of Science:
- Forensic Anthropology
- Human Osteology
- Bioarchaeology
Background:
- The mastoid process exhibits significant sexual dimorphism, making it valuable for sex estimation in skeletal remains.
- Existing osteological methods for analyzing mastoid process morphology are varied but often struggle with its complex anatomical structure.
- Consistent and effective analysis of mastoid process sexual dimorphism remains a challenge in forensic and anthropological research.
Purpose of the Study:
- To critically compare existing techniques and variables used for defining, measuring, and visually scoring sexual dimorphism in the mastoid process.
- To identify limitations in current protocols for capturing the full morphological variation of the mastoid process.
- To propose improvements and standardization strategies for mastoid process analysis, encompassing both traditional and 3D methods.
Main Methods:
- Comparative analysis of established osteological techniques for mastoid process assessment.
- Evaluation of variables used in previous studies for quantifying mastoid process size and shape.
- Review of visual scoring methods applied to mastoid process sexual dimorphism.
- Consideration of 3D-based analytical approaches.
Main Results:
- Current methods for analyzing mastoid process sexual dimorphism do not fully encompass its morphological variability.
- Discrepancies exist in how size and shape variations are defined, measured, and scored across different studies.
- Traditional and 3D approaches require refinement to enhance accuracy and consistency in sex estimation.
Conclusions:
- Standardization of mastoid process analysis is crucial for reliable sex estimation in osteological research.
- Improved methodologies, integrating traditional and advanced 3D techniques, are needed to better capture mastoid process morphology.
- Further research should focus on developing and validating refined protocols for mastoid process sexual dimorphism assessment.

