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NCJRS Abstract

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NCJ Number: 229696 Find in a Library
Title: "Lateral Angle" of the Internal Auditory Canal: Non-Association with Temporal Bone Pneumatization
Journal: Journal of Forensic Sciences  Volume:55  Issue:1  Dated:January 2010  Pages:141-144
Author(s): Norman Wendell Todd, M.D., M.P.H.; Matthias Graw, M.D.; Maria Dietzel, Dipl.Biol
Date Published: January 2010
Page Count: 4
Type: Report (Study/Research)
Format: Article
Language: English
Country: United States of America
Annotation: The "lateral angle," the angle with which the posterior wall of the internal auditory canal meets the posterior fossa plate, is arguably wider in females (greater than 45 degrees) than males (less than 45 degrees). Not previously addressed, however, are repeatability of angle determination, and whether the extent of temporal bone pneumatization is a confounder.
Abstract: Forty-one adult human cranial specimens (82 clinically normal temporal bones) were studied; no sex information was available for this United States sample. Two casts were created from each ear; each cast was independently categorized twice. No association of lateral angle with mastoid size was found. Repeatability was good. Although bilateral symmetry was suggested (phi equals 0.60, p equals 0.05), two crania had oppositely categorized right-left angles. We observed a new finding: narrowed but clinically normal canals in 10 percent of crania. The lateral angle is a good candidate to be a morphological method in determination of sex. 2 figures, 2 tables, and 8 references (Published abstract)
Main Term(s): Criminology
Index Term(s): Bone analysis; Death investigations; Forensic sciences; Gender determination; Investigative techniques; Victim identification
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