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Indian Journal of Anatomy

Volume  11, Issue 1, January-March 2022, Pages 9-14


Original Article

Comparative Study of Foramen Magnum in Dry Cadaveric Skulls and Computerized Tomography Images in North Interior Part of Karnataka Region
1Mohammad Tahir K Qureshi, 2Ishwar B Bagoji 3R S Bulagouda, 4Gavishiddappa A Hadimani, 5M Lakshmi Narayan, 6Anand V Nimbal
1,2,3Assistant Professor, Department of Anatomy, 6Professor and HOD, Department of Dentistry, Sri BM Patil Medical College, (Blde Deemed to be University) Vijayapura, Karnataka 586103, India, 4,5Assistant Professor, Department of Community Medicine, Hassan Institute of Medical Sciences, Hassan, Karnataka 573201, India
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The foramen magnum (FM) is a unique and complex anatomical opening in the base of the skull,which the posterior cranial fossa communicates with the vertebral canal. It is also related to a number of pathological conditions, including Chiari malformations, various tumours, and occipital dysplasias. The study aimed to compare and evaluate the foramen magnummorphology in dry skulls and CT scan images. Material and methods: The morphology of the foramen magnum was assessed in 118 adult non-pathological dry human skulls and 3D computer tomography images in 118 individuals (66 male, 52 female) aged 18–75 years. Result: the incidence of various shapes of the foramen magnum was observed the most common shape was oval (33.89%) in skulls, followed by round (15.25%), tetrahedral (13.55%), pentagonal (7.32%), hexagonal (16.94%) and irregular (12.71%). The mean anteroposterior 33.76 ±2.1mm & 28.09+ 1.9 mm transverse diameter of the foramen magnum. The minimum and maximum values for AP diameter were 31.78 & 39.13. Inthe CT scan study, the mean anteroposterior diameter of FM in the male 35.96± 3.7 and 33.85±3.5 in females. The transverse diameter in males 30.38±3.5 and 27.83±2.5 in females. The FMI was observed in males 85.48±9.1 and 83.26±9.0 in female. Discussion: Results provides baseline data for the anatomist and important information for neurosurgeons to approach the cranial base with maximum safety and minimum mortality and morbidity.

Corresponding Author : Ishwar B Bagoji