Anatomy of the mastoid triangle and morphometric sex differences

Fonseca, M.T.; Siqueira, L.F.R.; Belo, I.S.; Rodrigues, Lívia Gonçalves; Torres, É.M. de; Franco, Ademir; Silva, R.F.

doi:10.1016/j.morpho.2022.11.003

Cited by 2 publications

(6 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The studies mentioned in Table 4 have shown that the linear and area measurements of the mastoid triangle were mostly higher in males than in females. 1,2,7,[9][10][11][12][13][14][15][16][17][18][19][20][21][22][23] In the current study, males also showed higher linear and area measurements than females (P = 0.000). Boyle's law, 3,24 the acoustic method, 25 and radiological methods, including CT scans, [26][27][28][29][30][31][32][33][34][35][36][37][38][39][40][41] have been used to measure MACS volumes (Table 5).…”

Section: Discussionmentioning

confidence: 71%

“…Linear and area measurements of the mastoid process have been studied using various methods, such as direct measurements of dry skulls, 9,11,13,16–19,22 radiographs of lateral cephalograms, 12 and CT scans 1,7,14,15,20,21,23 (Table 4). The studies mentioned in Table 4 have shown that the linear and area measurements of the mastoid triangle were mostly higher in males than in females 1,2,7,9-23 . In the current study, males also showed higher linear and area measurements than females ( P = 0.000).…”

Section: Discussionmentioning

confidence: 99%

“…This morphological difference is widely recognized as an anatomical marker of sexual dimorphism in the skull 8 . Studies on the effectiveness of the mastoid process for sex estimation have typically focused on the mastoid triangle, using the area and distances between the porion-asterion, asterion-mastoidale, and porion-mastoidale, which form a triangle, as predictors 8–16 . Other researchers have used additional or alternative measurements, such as the mastoid height, width, length, and opisthione-bimastoid triangle 2,17–23 .…”

mentioning

confidence: 99%

“…8 Studies on the effectiveness of the mastoid process for sex estimation have typically focused on the mastoid triangle, using the area and distances between the porion-asterion, asterionmastoidale, and porion-mastoidale, which form a triangle, as predictors. [8][9][10][11][12][13][14][15][16] Other researchers have used additional or alternative measurements, such as the mastoid height, width, length, and opisthione-bimastoid triangle. 2,[17][18][19][20][21][22][23] Previous studies have shown that the mastoid process, together with the pars petrosa of the temporal bone, is one of the most robust and sexually dimorphic structures of the skull, thereby providing an applicable marker for forensic identification, particularly for sex determination.…”

mentioning

confidence: 99%

See 3 more Smart Citations

Sex Estimation From Measurements of the Mastoid Triangle and Volume of the Mastoid Air Cell System Using Classical and Machine Learning Methods

Sasani,

Etli,

Tastekin

et al. 2023

Am J Forensic Med Pathol

View full text Add to dashboard Cite

Previous studies on the sexual dimorphism of the mastoid triangle have typically focused on linear and area measurements. No studies in the literature have used mastoid air cell system volume measurements for direct anthropological or forensic sex determination. The aims of this study were to investigate the applicability of mastoid air cell system volume measurements and mastoid triangle measurements separately and combined for sex estimation, and to determine the accuracy of sex estimation rates using machine learning algorithms and discriminant function analysis of these data. On 200 computed tomography images, the distances constituting the edges of the mastoid triangle were measured, and the area was calculated using these measurements. A region-growing algorithm was used to determine the volume of the mastoid air cell system. The univariate sex determination accuracy was calculated for all parameters. Stepwise discriminant function analysis was performed for sex estimation. Multiple machine learning methods have also been used. All measurements of the mastoid triangle and volumes of the mastoid air cell system were higher in males than in females. The accurate sex estimation rate was determined to be 79.5% using stepwise discriminant function analysis and 88.5% using machine learning methods.

show abstract

Section: Discussionmentioning

confidence: 71%

Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

Sex Estimation From Measurements of the Mastoid Triangle and Volume of the Mastoid Air Cell System Using Classical and Machine Learning Methods

Sasani,

Etli,

Tastekin

et al. 2023

Am J Forensic Med Pathol

View full text Add to dashboard Cite

show abstract

“…Дослідження, виконані на черепах осіб різних рас, встановили статеві відмінності лінійних розмірів СВ [5,7,9,10,11,13,14,16,17], форми та розмірів соскоподібного трикутника [2,3,6,8]. Іншим показником, що використовується для аналізу, є відстань між верхівками соскоподібних відростківсоскоподібними точками (mastoidale)міжсоскоподібна відстань (МСВ; англ.…”

Section: вступunclassified

Intermastoid distance as a criterion for determining the sex of the human skull

Koltsova,

Stepanenko

2023

Rep. of Vinnytsia Nation. Med. Univ.

View full text Add to dashboard Cite

Annotation. The mastoid processes of the temporal bones are of great interest from the point of view of determining the sex of whole skulls and their fragments. The researchers established sex differences in the linear dimensions of the mastoid processes, the shape and dimensions of the mastoid triangle, and the length of the intermastoidale distance. By discriminant function analysis, it was determined that the intermastoidale distance is one of the best indicators for determining the gender of the skull. At the same time, previous studies of the sex difference in the intermastoidale distance did not consider the relationship of this indicator with morphometric parameters characterizing the size of the skull. The purpose of this study is to establish the patterns of individual variability of the intermastoidale distance, namely, its relationship with the variability of the width of the skull base, the distance between asterions and the width of the cerebral cranium (transverse diameter of the skull). The study was conducted on 55 skulls (35 male and 20 female) from the craniological collection of the Department of Human Anatomy of KhNMU. Correspondence of the distribution of morphometric indicators to the normal distribution was determined using the Kolmogorov-Smirnov test with the Lilliefors correction. Statistical processing of measurement results was carried out using Excel 10 and Statistica 7 software packages. It was established that the intermastoidale distance in men is significantly greater than in women (M±s: 108,0±5,7 and 98±1,6, respectively; p<0.05). This is explained by the larger size of the male skull compared to the female one and the peculiarities of the constitution of male and female organisms. In men, there are statistical relationships between the intermastoidale distance and the width of the base of the skull (y = 0.5x + 41.0; r = 0.6; ); between the intermastoidale distance and the width of the cerebral part of the skull (y=0,4x+52,4; r=0,4); between the intermastoidale distance and the distance between asterions (y=0,6x+41,8; r=0,4) are noticeable and statistically significant (p<0.05). At the same time, in women they are small and statistically insignificant (respectively y=0,1x+87,4; r=0,3; y=0,1x+88,1; r=0,2; y=0,2x+74.8; r=0,3, p>0,05). The difference in the strength of the correlation between the studied parameters in male and female skulls may indicate the influence of various factors on the degree of the intermastoidale distance relationships with the studied skull dimensions depending on sex. We propose to consider the strong positive correlation between the intermastoidale distance and the width of the skull base established in this study as a factor that will allow for a qualitative (significant) increase in the accuracy of skull sex determination.

show abstract

Anatomy of the mastoid triangle and morphometric sex differences

Cited by 2 publications

References 17 publications

Sex Estimation From Measurements of the Mastoid Triangle and Volume of the Mastoid Air Cell System Using Classical and Machine Learning Methods

Sex Estimation From Measurements of the Mastoid Triangle and Volume of the Mastoid Air Cell System Using Classical and Machine Learning Methods

Intermastoid distance as a criterion for determining the sex of the human skull

Contact Info

Product

Resources

About