First Advisor

Marc R. Feldesman

Date of Publication

2002

Document Type

Thesis

Degree Name

Master of Arts (M.A.) in Anthropology

Department

Anthropology

Language

English

Subjects

Sex differences, Humerus

DOI

10.15760/etd.5455

Physical Description

1 online resource (80 pages)

Abstract

Visual and metric analysis both provide accepted methods for sex determination in humans. Visual ascertainment uses differing morphological traits in males and females to establish sex. Researchers have continually sought accurate methods of sexing long bones when skulls or pelves are absent or fragmented. These long bone elements may not have sexually distinct characteristics, but tend to survive in the field quite well.

Metric analysis depends on size dimorphism between males and females to correctly assign sex. Metric methods fail where the sexes overlap or when skeletal elements cannot be assigned to their correct biological population. Under these conditions, visual ascertainment is extremely useful. It relies on descriptive features, not size, to interpret the shape variations between male and female elements. For example, physiological soft tissue variations in the "carrying angle'" of the arm at the humero-radioulnar junction are known to be sexually dimorphic; therefore, the hard tissue features of the distal humerus also should be sexually dimorphic.

I observed six distinct visual characteristics of the distal humerus to determine sex in a blind study conducted on 649 individuals sampled from diverse biological populations. In addition to visual assessment, I collected four humeral measurements to determine whether quantitative analysis would be a better indicator of sex than non-metric analysis. I used nonparametric statistical methods to examine· the significance of each morphological feature and its relationship to known sex. All characteristics showed a high association with sex, and the relationships between sex and each characteristic were statistically strong. The final predictive quality of this method was 84% regardless of population; I concluded that my visual method is a dependable sex predictor among diverse populations. Every biological group varied considerably in size dimensions, but exhibited common morphological features of the distal humerus. This confirms that visual techniques provide accurate results regardless of biological affiliation. In many cases, visual assessment was as accurate or more accurate than metric analysis. Therefore, the distal humerus and its unique physical features provide an alternative method to previously used quantitative techniques in the determination of sex.

Rights

In Copyright. URI: http://rightsstatements.org/vocab/InC/1.0/ This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s).

Comments

If you are the rightful copyright holder of this dissertation or thesis and wish to have it removed from the Open Access Collection, please submit a request to pdxscholar@pdx.edu and include clear identification of the work, preferably with URL

Persistent Identifier

http://archives.pdx.edu/ds/psu/20240

Download

Share

COinS