Morphometric features of asterion in adult human skulls

Deepak, Seema; Kr, Dakshayani

doi:10.18203/2320-6012.ijrms20150140

Cited by 7 publications

(11 citation statements)

References 4 publications

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“…Mwachaka et al concluded that majority of the cases had junction at asterion in their data. They presented only one case having transverse-sigmoid sinus junction located below asterion (17). Our data was in consistent with the literature in terms of relation between asterion and junction of sinuses.…”

Section: Discussionsupporting

confidence: 91%

“…Sudha Asterion is a reliable landmark for proper craniotomy. Location of asterion is of critical importance in posterior cranial fossa and posterolateral cranial base surgery (17). Burr hole formation and following craniotomy is the first step of surgical approach which prevents complications and long surgery time (1,4,5,17).…”

Section: Discussionmentioning

confidence: 99%

“…Location of asterion is of critical importance in posterior cranial fossa and posterolateral cranial base surgery (17). Burr hole formation and following craniotomy is the first step of surgical approach which prevents complications and long surgery time (1,4,5,17). Underlying asterion is the junction of transverse sinus and sigmoid sinus and overlying asterion is scalp (2,17).…”

Section: Discussionmentioning

confidence: 99%

“…Surgeons use palpable bony landmarks for proper orientation of asterion location. There are studies in the literature determining these bony features (1,17,18). Leon et al determined safety zone by four points and a plane: root of zygomatic arch, suprameatal spine, apex of mastoid process, external occipital protuberance and Frankfurt horizontal plane.…”

Section: Discussionmentioning

confidence: 99%

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Evaluation of Asterion Morphometry in Terms of Clinical Anatomy

Akkaşoğlu¹,

Farımaz²,

Aktaş³

et al. 2019

Eastern J Med

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Asterion is the junction of lambdoid, parietomastoid and occipitomastoid sutures and it corresponds to the location of the posterolateral fontanelle. It is close related to the location of junction of transverse and sigmoid sinuses. Mastoid process, posterior end of zygomatic arch, external occipital protuberance and lambda are bony features in close proximity of asterion. In the present study we measured the distance between asterion and each of aforementioned bony points. Twenty human dry skulls were included in this study. Distance between asterion and mastoid process was 43.65 ± 6.75 mm on the left side and 45.01± 6.04mm on the right side. Distance between asterion and posterior end of zygomatic arch was 43.97 ± 7.37 mm on the left side and 43.95± 7.02 mm on the right side. Distance between asterion and external occipital protuberance was 62.59 ± 8.83 mm on the left side and 54.75 ±5.57mm on the right side. Distance between asterion and lambda was 81.40 ± 7.36 mm on the left side and 82 ± 4.96 mm on the right side. In 84 % of the cases asterion was at the junction of transverse and sigmoid sinuses. In 12% of the cases asterion was below the junction of transverse and sigmoid sinuses. In 4 % of the cases asterion was above the junction of transverse and sigmoid sinuses. Asterion is the essential point to indicate safety zone for surgical approach and to determine sex and age. It is of great interest of anatomists, anthropologists, forensic experts, radiologists and neurosurgeons

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Section: Discussionsupporting

confidence: 91%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Evaluation of Asterion Morphometry in Terms of Clinical Anatomy

Akkaşoğlu¹,

Farımaz²,

Aktaş³

et al. 2019

Eastern J Med

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“…Asterion is the junction of the mastoid part of temporal, parietal and occipital bones. It serves as an important surgical landmark for the posterior cranial fossa, corresponding to the location of the transverse sinus and is also a surface landmark for anthropological and radiological measurements of the skull [6][7][8]. Asterion is referred to as "Posterolateral fontanelle" in infants.…”

Section: Introductionmentioning

confidence: 99%

Morphometric Analysis and Variation of Pterion, Asterion and Lambda in Dry Human Skulls and Its Sexual Dimorphism

Karunakaran

Mohanraj

2021

JPRI

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Introduction: Pterion is a H- shaped sutural junction of the frontal, parietal, squamous part of the temporal and greater wing of sphenoid bone. Asterion is a sutural junction of lambdoid, parietomastoid and occipitomastoid sutures. Lambda is the junction where lambdoid sutures and sagittal sutures meet. These sutures play an important role in infants' brain development. Flexibility of these allows the bones to overlap and hence it can pass through the brain canal easily without any damage to the brain. Aim: To analyse pterion asterion and lambda of dry human skulls morphologically and morphometrically and determine its sexual dimorphism. Materials and Methods: 40 dry human skulls were collected from the department of Anatomy of Saveetha dental college and hospitals. By excluding abnormal and damaged skulls, 20 skulls were studied. Out of 20 skulls, 11 were male skulls and 9 were female skulls. On investigation, Pterion was classified into four types: Sphenoparietal, stellate, Epipteric and Frontotemporal. Asterion was classified into types: Type-1 and Type-2 based on the presence and absence of wormian bones respectively. Lamda was classified into two types: Normal and Abnormal. Statistical analysis was done by SPSS software. Paired Sample T test was used to analyse the data. Results: Percentage of occurrence of different types of pterion in males and females: Sphenoparietal (59.09 % of males and 59.09 % of females), Stellate (27.7% of males and 22.2% of females), Epipteric (99% of males and 16.6% of females) and Frontotemporal (45.5% of males and 5.5% of females). Different types of Asterion: Type-1 (13.63% of males and 16.66 % of females and Type -2 (86.63% of males and 83.33% of females). Different types of Lambda: Normal (90.9% of males and 94.4% of females), Abnormal (9% of males and 5.55% of females). Conclusion: In the present study, there was no correlation between the male and female skulls in the presence of Pterion, Asterion and Lambda. Therefore these cannot be used as reliable parameters for determining sexual dimorphism.

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