Reliability of the lateral angle of the internal auditory canal for sex determination of subadult skeletal remains

Gonçalves, David; Campanacho, Vanessa; Cardoso, Hugo F.V.

doi:10.1016/j.jflm.2011.01.008

Cited by 13 publications

(22 citation statements)

References 14 publications

(23 reference statements)

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“…Although similar outcome has been attained previously in unburned bones [12], this comes in contrast with the results from other investigations [5,8,10,13], especially with the one from Masotti et al [6] which also focused on burned remains. This may have been because of our difficulty in applying the method-evidenced by a large inter-observer error-and to the possible impact of heat-induced shrinkage and warping on the natural sexual dimorphism of the internal auditory canal, as suggested by Masotti et al [6].…”

Section: Discussionsupporting

confidence: 47%

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Sexual dimorphism of the lateral angle of the internal auditory canal and its potential for sex estimation of burned human skeletal remains

2015

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The potential of the petrous bone for sex estimation has been recurrently investigated in the past because it is very resilient and therefore tends to preserve rather well. The sexual dimorphism of the lateral angle of the internal auditory canal was investigated in two samples of cremated Portuguese individuals in order to assess its usefulness for sex estimation in burned remains. These comprised the cremated petrous bones from fleshed cadavers (N = 54) and from dry and disarticulated bones (N = 36). Although differences between males and females were more patent in the sample of skeletons, none presented a very significant sexual dimorphism, thus precluding any attempt of sex estimation. This may have been the result of a difficult application of the method and of a differential impact of heat-induced warping which is known to be less frequent in cremains from dry skeletons. Results suggest that the lateral angle method cannot be applied to burned human skeletal remains.

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Section: Discussionsupporting

confidence: 47%

“…The shots were taken on an orthogonal plane. The lateral angle is formed by the intersection of the posterior external surface of the petrous bone and the adjacent surface of the IAC [5,[8][9][10]. The median value of three attempts of measurement was used for the analysis.…”

Section: Methodsmentioning

confidence: 99%

Sexual dimorphism of the lateral angle of the internal auditory canal and its potential for sex estimation of burned human skeletal remains

2015

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“… were not able to correctly classify more than 66% of their sample using discriminant function analysis, and Gonçalves et al. correctly classified only 62.9% of individuals. In addition, using linear discriminant analysis in blind trials, Panenková et al.…”

Section: Discussionmentioning

confidence: 95%

“… and Gonçalves et al. . Despite finding significant differences between male and female lateral angle means, both of these studies describe a failure of the lateral angle to consistently classify individuals according to sex in an adult skeletal sample and a subadult skeletal sample, respectively.…”

Section: Discussionmentioning

confidence: 96%

The Lateral Angle Revisited: A Validation Study of the Reliability of the Lateral Angle Method for Sex Determination Using Computed Tomography (CT)^,

Morgan

Lynnerup

Hoppa

2013

Journal of Forensic Sciences

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This article presents the results of a validation study of a previously published method of sex determination from the temporal bone. The purpose of this study was to evaluate the lateral angle method for the internal acoustic canal for accurately determining the sex of human skeletal remains using measurements taken from computed tomography (CT) scans. Previous reports have observed that the lateral angle size in females is significantly larger than in males. The method was applied to an independent series of 77 postmortem CT scans (42 males, 35 females) to validate its accuracy and reliability. The mean lateral angle of the internal acoustic canal was found to be larger in females (46.5°) than in males (43.4°). However, the difference was not statistically significant and the sex differences reported in previous studies were not substantiated. In light of the observed results, the lateral angle method appears to be of minimal practical use in forensic anthropology and archeology.

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“…There are still other possibilities for studying the temporal bone, such as measuring the lateral angle of the IAC, which may prove useful for gender determination (43). This forensic strategy was not used in the present study, but can contribute to the measurements used herein to improve the characterization of this skull compartment.…”

Section: Discussionmentioning

confidence: 99%

Morphometric Analysis of the Internal Auditory Canal by Computed Tomography Imaging

Marques¹,

Ajzen

Ippolito

et al. 2012

Iran J Radiol

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BackgroundMany clinical and experimental studies have been done to analyze the anatomical and functional aspects of the internal auditory canal (IAC) in human beings since there are great inter-individual variability and structural variations that may occur regarding the other adjacent structures.ObjectivesThe purpose of this study was to characterize the morphology of the internal auditory canal (IAC) during development using high resolution computed tomography (CT) and to analyze its dimensions, which will be determined by measuring the nearby areas and structures using a system of digital image processing.Patients and MethodsCT images of the IAC of 110 normal subjects aged 1 to 92 years (mean age, 46.5 years) of both genders were reviewed to determine the shape, area, opening width (OW), longitudinal length (LL), vertical diameter (VD) and distance from the vestibular aqueduct.ResultsThe shapes observed in children and adults were funnel-shaped (74% and 58.3%, respectively), cylindrical (22% and 30.9%, respectively) and bud-shaped (4% and 10.8%, respectively). The measurements by CT in children were: area= 50.30 mm2, OW = 7.53 mm, length = 11.17 mm, VD = 4.82 mm and the distance between the IAC and the vestibular aqueduct (VA) = 12.63 mm. In adults, the measurements were: area = 44.64 mm2, OW = 7.10 mm, length = 9.84 mm, VD = 4.47 mm and the distance between IAC and VA = 11.17 mm.ConclusionsCT images showed that the IAC has different shapes and when the measurements obtained for children were compared with those of adults, the parameters that presented statistically significant differences in either gender were length and diameter.

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Reliability of the lateral angle of the internal auditory canal for sex determination of subadult skeletal remains

Cited by 13 publications

References 14 publications

Sexual dimorphism of the lateral angle of the internal auditory canal and its potential for sex estimation of burned human skeletal remains

Sexual dimorphism of the lateral angle of the internal auditory canal and its potential for sex estimation of burned human skeletal remains

The Lateral Angle Revisited: A Validation Study of the Reliability of the Lateral Angle Method for Sex Determination Using Computed Tomography (CT)^,

Morphometric Analysis of the Internal Auditory Canal by Computed Tomography Imaging

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Reliability of the lateral angle of the internal auditory canal for sex determination of subadult skeletal remains

Cited by 13 publications

References 14 publications

Sexual dimorphism of the lateral angle of the internal auditory canal and its potential for sex estimation of burned human skeletal remains

Sexual dimorphism of the lateral angle of the internal auditory canal and its potential for sex estimation of burned human skeletal remains

The Lateral Angle Revisited: A Validation Study of the Reliability of the Lateral Angle Method for Sex Determination Using Computed Tomography (CT),

Morphometric Analysis of the Internal Auditory Canal by Computed Tomography Imaging

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The Lateral Angle Revisited: A Validation Study of the Reliability of the Lateral Angle Method for Sex Determination Using Computed Tomography (CT)^,