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Skeletal Muscle Gender Dimorphism from Proteomics
Published on: December 14, 2011
Sexual dimorphism in ulna: an osteometric study from India
Rashmi Srivastava1, Vineeta Saini1, Rajesh Kumar Rai1
1Department of Forensic Medicine, Institute of Medical Sciences, Banaras Hindu University, Varanasi 221005, India.
Journal of Forensic Sciences
|May 31, 2013
Summary
Forensic anthropologists can determine sex from human ulnae using specific measurements. Maximum length and radial notch width of the ulna provide the highest accuracy in sex determination for North Indian populations.
Area of Science:
- Forensic Anthropology
- Human Osteology
- Bioarchaeology
Background:
- Sex determination from skeletal remains is crucial in forensic identification.
- Existing methods for sex determination using skeletal features show variable reliability.
- Establishing population-specific standards is essential for accurate forensic analysis.
Purpose of the Study:
- To establish sexual dimorphic standards for the ulna in a North Indian population.
- To evaluate the effectiveness of various ulna measurements in sex determination.
Main Methods:
- Eight standard measurements were taken from 106 ulnae (80 male, 26 female) aged 25-65 years.
- Sexual dimorphism index and demarking points were calculated for each variable.
- Discriminant function analysis (stepwise and direct) was employed to assess classification accuracy.
Main Results:
- Maximum length (84.9%) and radial notch width (84%) were the most effective discriminators of sex.
- Stepwise discriminant function analysis using maximum length and radial notch width achieved 88.7% accuracy (87.5% male, 92.3% female).
- Analysis of proximal ulna features yielded an 81.1% classification rate (80% male, 84.6% female).
Conclusions:
- Specific measurements of the ulna, particularly maximum length and radial notch width, are reliable indicators for sex determination in North Indian individuals.
- The developed standards contribute valuable data for forensic anthropological identification in this population.
- Ulna morphometrics offer a viable method for sex estimation in skeletal analyses.
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