Publication Date

1983

Document Type

Dissertation/Thesis

First Advisor

Orlosky, Frank James, 1943-

Degree Name

M.A. (Master of Arts)

Legacy Department

Department of Anthropology

LCSH

Chin; Facial expression; Mandible

Abstract

The growth of the human mandible has been studied extensively, but questions still remain. In this report the expression of the chin in the human mandible is examined. Three potential factors appeared to be of major significance in the evolution of the mental protuberance: the shifting of the alveolar and mandibular components; the reduction in size of the dentition, and the stress of the medial- pulling lateral pterygoid muscles. The significance of each of these factors was tested in this thesis. Radiographic and metric data from 71 laboratory specimens was used. Data were gathered from the mandibles of 56 adults, 10 children, and 5 adolescents. Correlation and partial correlation statistics were used to test three general hypotheses regarding the expression of the chin in relation to the three possible factors in the evolution and development of the chin. The results did not support the shifting or the dental reduction hypotheses. However, mandibular width and symphyseal variables were significantly correlated and the third hypothesis was supported.

Comments

Bibliography: pages 50-53.

Extent

vi, 53 pages

Language

eng

Publisher

Northern Illinois University

Rights Statement

In Copyright

Rights Statement 2

NIU theses are protected by copyright. They may be viewed from Huskie Commons for any purpose, but reproduction or distribution in any format is prohibited without the written permission of the authors.

Media Type

Text

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