Morphometric Study of Pterion in Adult Dry Skulls in Dakshina Kannada District, Karnataka State, India

Anjana, S.; K.S, Satheesha.; Bhaskar, Ravi; Pai, Shakunthala R

doi:10.16965/ijar.2015.298

Cited by 4 publications

(1 citation statement)

References 5 publications

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“…4 Clinically, pterion is an important landmark as it marks the position of the anterior branch of the middle meningeal artery, lateral sulcus of the brain, and Broca's motor speech area. 5 6 Thickness of the skull in this region of the pterion is relatively less, making it a fragile point 7 a trivial blow in this region may rupture the middle meningeal artery. The topographic location of the pterion is important for a neurosurgeon in order to have the most suitable bony aperture to be minimally invasive.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Variations in the Morphology, Topography of the Pterion, and Their Implications in Neurosurgery: An Osteometric Study

Aggarwal,

Kaur,

Patra

et al. 2023

Asian J Neurosurg

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Objective Pterion is an “H” shaped formation of sutures located in the temporal fossa of the skull. It is an important anatomical landmark and a craniometric point. The thinness of the skull and its inner relation with the middle meningeal artery make this anatomical landmark clinically significant. Variations in the pterion are imperative, especially for neurosurgeons in order to have the most suitable craniometric point to be minimally invasive. Materials and Methods One hundred pterions were studied to report the variations in the type and location of the pterion. Murphy's classification was used to classify the pterion into four types on the basis of bone articulation-sphenoparietal, frontotemporal, stellate, and epipteric. Results All four types of pterions were observed, sphenoparietal being the most common. No significant gender difference was observed in terms of type and laterality of various pterions. The mean distance between the center of pterion to the superolateral point of zygomaticotemporal (PZT) suture and the anterolateral point of the frontozygomatic (PFZ) suture were 3.91 ± 3.79 cm and 3.68 ± 3.79 mm, respectively. Correlation analysis showed a strong positive relation between PZT and PFZ sutures. Conclusion Accurate data on the morphology and morphometry of bony anatomical points are crucial, while performing intracranial surgery using them as recognizable landmarks. The morphometric parameters may help in determining the soundness of the pterion as an identifiable landmark for performing interventions like burr hole and other neurosurgical procedures in this area.

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Section: Introductionmentioning

confidence: 99%

Analysis of the Variations in the Morphology, Topography of the Pterion, and Their Implications in Neurosurgery: An Osteometric Study

Aggarwal,

Kaur,

Patra

et al. 2023

Asian J Neurosurg

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Anthropometric Evaluation of Pterion in Dry Human Skulls Found in Southern India

Rathnakar¹,

Vinod²,

Swathi³

et al. 2019

jemds

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BACKGROUND Pterion is a H-shaped sutural convergence seen in the Norma Lateralis of skull. After 2-3 months of birth, the anterolateral fontanelle in the neonatal skulls close to form the pterion. It is the meeting point of four bones sphenoid, parietal, temporal and frontal. Four types have been noted-spheno-parietal, fronto-temporal, epipteric and stellate. Pterional approach is commonly undertaken in surgical management of tumours involving inferior aspects of frontal lobe, like olfactory meningiomas, orbital, retro-orbital, sellar, chiasmatic, subfrontal, prepontine areas, anterior circulation and basilar artery aneurysm. The knowledge regarding the various shapes and distances from different points to pterion (distance of centre of pterion was calculated from mid-point of superior margin of zygomatic arch (PZA), Frontozygomatic suture (PFZ), tip of the mastoid process (PMP), and anterosuperior margin of external acoustic meatus (PEAM)) is useful for treating number of pathologies in brain. So, this is also useful for neurosurgeons, anatomists, anthropologists and forensic medicine specialists. In the present study, we have attempted to classify the type of pterion and calculated the distance of centre of pterion from various landmarks and compared the measurements on the right and left side. METHODS This study was conducted in the Department of Anatomy, K. S. Hegde Medical Academy, Mangalore. 50 dry human skulls of unknown sex were obtained from the Department of Anatomy and studied. The pterion was observed and classified according to the articulation of bones and the distance of centre of pterion was calculated from mid-point of superior margin of zygomatic arch (PZA), Frontozygomatic suture (PFZ), tip of the mastoid process (PMP), and anterosuperior margin of external acoustic meatus (PEAM). RESULTS The sphenoparietal variety was the commonest (72%) followed by fronto temporal (18 %) and the least common was epipteric (2%). On comparison of measurements of right and left sides, distance of centre of pterion from mid-point of superior margin of zygomatic arch (PZA), Frontozygomatic suture (PFZ), tip of the mastoid process (PMP), and anterosuperior margin of external acoustic meatus (PEAM) did not show any significant difference. CONCLUSIONS Knowledge of position of pterion from various landmarks is very important for neurosurgeons as there is a chance of injury to vital structures present beneath the pterion. The knowledge of position of pterion from various landmarks is very important for neurosurgeons as there is a chance of injury to vital structures present beneath pterion. This study is aimed at South Indian population and can be conducted among other populations.

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Morphometric Study of Pterion and Its Clinical Significance

Nayak

Mohanty

Das

2017

Asian J Pharm Clin Res

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Objective: Pterion is an area formed by the union of frontal, parietal, temporal, and sphenoid bones. It exhibits variations in the sutural pattern of fusion of constituent bones. Basing on this, the pterion can be classified into four varieties. According to Murphy, these are sphenoparietal, frontotemporal, stellate, and epipteric. The anatomical location of the pterion is necessary for the surgical management of extradural hemorrhage, aneurysm, and brain tumors located in the anterior and middle cranial fossae.The purpose of this study is to find out the prevalence of different varieties of pterion and determine the position of pterion using anatomical landmarks. Methods:The present study included fifty skulls of unknown age and sex. The skulls were studied macroscopically for the anatomical variations of pterion. The distance between the center of the pterion to the midpoint of zygomatic arch and pterion to the frontozygomatic suture was measured using Vernier calipers. Results:The sphenoparietal variety was the most common variety of pterion found in the study followed by the epipteric variety and the stellate variety, respectively. The distance between pterion and back of the frontozygomatic suture was found to be 3.48 ± 0.21 cm on the right side and 3.41 ± 0.16 cm on the left side. The distance between pterion and the midpoint of upper border of the zygomatic arch was found to be 4.01 ± 0.19 cm on the right side and 3.94 ± 0.2 cm on the left side. Conclusion:The findings will be helpful for radiologists and neurosurgeons.

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Morphometric Study of Pterion in Adult Dry Skulls in Dakshina Kannada District, Karnataka State, India

Cited by 4 publications

References 5 publications

Analysis of the Variations in the Morphology, Topography of the Pterion, and Their Implications in Neurosurgery: An Osteometric Study

Analysis of the Variations in the Morphology, Topography of the Pterion, and Their Implications in Neurosurgery: An Osteometric Study

Anthropometric Evaluation of Pterion in Dry Human Skulls Found in Southern India

Morphometric Study of Pterion and Its Clinical Significance

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