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Morphology and the position of the pterion in a Sri Lankan population

Authors:

J. Disanayake ,

University of Peradeniya, 20400, Peradeniya, LK
About J.
Department of Anatomy, Faculty of Medicine
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H. Sampath,

University of Peradeniya, 20400, Peradeniya, LK
About H.
Division of Anatomy, Department of Basic Sciences, Faculty of Dental Sciences
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R. Manawaratne,

University of Peradeniya, 20400, Peradeniya, LK
About R.
Division of Anatomy, Department of Basic Sciences, Faculty of Dental Sciences
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G. Nawarathna,

University of Peradeniya, 20400, Peradeniya, LK
About G.
Division of Anatomy, Department of Basic Sciences, Faculty of Dental Sciences
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M. Disanayake,

University of Peradeniya, 20400, Peradeniya, LK
About M.
Division of Anatomy, Department of Basic Sciences, Faculty of Dental Sciences
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R. Peiris,

University of Peradeniya, 20400, Peradeniya, LK
About R.
Division of Anatomy, Department of Basic Sciences, Faculty of Dental Sciences
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D. Nanayakkara

University of Peradeniya, 20400, Peradeniya, LK
About D.
Division of Anatomy, Department of Basic Sciences, Faculty of Dental Sciences
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Abstract

Objective: The present study was conducted to describe the morphology of the pterion, and its position in an adult Sri Lankan population.

 

Materials and methods: Fifty eight pteria of twenty nine adult skulls of known gender in a Sri Lankan population were analyzed to determine the sutural morphology of the pterion, and its precise location in relation to the posterolateral aspect of the frontozygomatic suture, midpoint of the zygomatic arch, anterior and superior most point of the external auditory meatus, and the inferior most point of the mastoid process.

 

Results: The predominant type of pterion observed was sphenoparietal (82.5%), followed by stellate (8.7%), frontotemporal (5.3%), and epipteric types (3.5%). The mean distances from the center of the pterion to the frontozygomatic suture were measured as 31.11 ± 5.02 mm and 26.98 ± 3.45 mm; to the zygomatic arch, 38.92 ± 3.55 mm and 36.16 ± 3.83 mm; to the mastoid process, 81.54 ± 4.62 mm and 77.79 ± 3.88 mm; and to the external acoustic meatus, 53.62 ± 2.58 mm and 51.91 ± 2.98 mm, in males and females, respectively.

 

Conclusion: The pterion in the males was positioned at a higher point from the zygomatic arch than in females while sphenoparietal type of pterion predominates in the Sri Lankan population.
How to Cite: Disanayake J, Sampath H, Manawaratne R, Nawarathna G, Disanayake M, Peiris R, et al.. Morphology and the position of the pterion in a Sri Lankan population. Sri Lanka Anatomy Journal. 2020;4(1):10–21. DOI: http://doi.org/10.4038/slaj.v4i1.110
Published on 15 Sep 2020.
Peer Reviewed

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