Foramen Magnum: A Morphological and Morphometric Study in Dried Human Skull Bones of Rajasthan Population and its Surgical Importance
Devesh K Sharma, Simmi Mehra
Achondroplasia, Arnold–Chiari syndrome, Foramen magnum
Citation Information :
Sharma DK, Mehra S. Foramen Magnum: A Morphological and Morphometric Study in Dried Human Skull Bones of Rajasthan Population and its Surgical Importance. J Mahatma Gandhi Univ Med Sci Tech 2018; 3 (2):41-49.
Introduction: The foramen magnum (FM) is a large opening in the base of the skull. The dimensions of FM are clinically important because many vital structure passing through it, viz., the lower end of medulla oblongata, the vertebral arteries, and spinal accessory nerves. It may endure compression such as in cases of FM herniation, FM meningiomas, and FM achondroplasia. The knowledge of FM diameter is needed to determine some malformations such as the Arnold–Chiari syndrome, which shows expansion of the transverse diameter.
Materials and methods: The present study was carried out on 75 dry human skulls of unknown age and sex belonging to Rajasthan population by the Department of Anatomy at Mahatma Gandhi Medical College and Hospital, Jaipur, Rajasthan. All the measurements were taken with the help of digital vernier calipers.
Results: The mean anteroposterior diameter was 35.11 ± 3.12 mm, the transverse diameter was 29.35 ± 3.48 mm, area was 813.94 ± 146.40 mm2, and the FM index was 1.208 ± 0.150. The FM shapes were determined as oval (22.67%), egg-shaped (12.00%), round (14.67%), tetragonal (14.67%), pentagonal (9.33%), hexagonal (16.00%), and irregular (10.67%).
Conclusion: This study will be useful for the anatomists, radiologists, neurosurgeons, and orthopedic surgeons.
dE Oliveira E, Rhoton AL Jr, et al. Microsurgical anatomy of the region of the foramen magnum. Surg Neurol 1985;24(3):293–352. DOI: 10.1016/0090-3019(85)90042-4.
Scheuer L, Black S. The Juvenile Skeleton. London: Elsevier; 2004. pp. 1–19.
Romanes GJ. Cunmningham's text book of anatomy, 12th ed., Oxford: Oxford University Press; 1981. p. 114.
Radhakrishna S, Shivarama CH, et al. Morphometric analysis of foramen magnum for sex determination in South Indian Population. Nite University Journal of Health Science 2012;2(1):20–22.
Murshed KA, Cicekcibasi AE, et al. Morphometric evaluation of the foramen magnum variations in its shape: a study on computerized tomographic images of normal adults. Turk J med Sci 2003;33(1): 301–306.
Chethan P, Prakash KG, et al. Morphological analysis and Morphometry of the Foramen Magnum: An Anatomical Investigation. Turkish Neurosurgery 2012;22(4):416–419. DOI: 10.5137/1019-5149.JTN.4297-11.1.
Bannister LH, Berry MM, et al. Gray's anatomy the anatomical basis of medicine and surgery, 38th ed., Edinburgh: Churchill Livingstone; 1995. pp. 567–568.
Hecht TJ, Horton WA, et al. Growth of the foramen magnum in achondroplasia. Am J Med Genet 1989;32:528–535. DOI: 10.1002/ajmg.1320320421.
Reich JB, Sierra J, et al. Magnetic resonance imaging measurements and clinical changes accompanying transtentorial and foramen magnum brain herniation. Annals of Neurology 1993;33:159–170. DOI: 10.1002/ana.410330205.
Ropper AH. MRI demonstration of the major feature of herniation. J Neurol Neurosurg Psychiatry 1993;56:932–935. DOI: 10.1136/jnnp.56.8.932.
Manoel C, Prado FB, et al. Morphometric analysis of the foramen magnum in human skulls of Brazilian individuals: its relation to gender. Braz J Morphol Sci 2009;26(2):104–108.
Tubbs RS, Griessenauer CJ, et al. Morphometric analysis of the foramen magnum: an anatomic study. Neurosurgery 2010;66: 385–388. DOI: 10.1227/01.NEU.0000363407.78399.BA.
Zaidi SH, Dayal SS. Variations in the shape of foramen magnum in Indian skulls. Anat Anz 1988;167(4):338–340.
Sumana R, Kirubhanand C, et al. Morphometric study of the foramen magnum in adult Human skulls in South Indian Population. Int J Anat Sci 2014;5(2):43–45.
Radhika PM, Shetty S, et al. Morphometric study of the foramen magnum in adult human skulls in Indian Population. Asian J Med Clin Sci 2014;3(1):68–72.
Rathva A, Shah K, et al. Morphometry and sexual dimorphism of human skull foramen magnum. Int J Recent Trends Sci Technol 2015;15(2):379–386.
Kumar A, Dave M, et al. Morphometric evaluation of foramen magnum in dry human skulls. Int J Anat Res 2015;3(2):1015–1023. DOI: 10.16965/ijar.2015.154.
Riyaz ZH, Siddiqui AA. Morphometric study of foramen magnum in human skulls. Int J Recent Trends Sci Technol 2015;17(1): 28–31.
Gopalakrishna K, Rathna BS. The craniometric study of foramen magnum of Indian population and variations in its dimensions. Int J Allied Med Sci Clin Res 2015;3(2):205–211.
Sharma S, Sharma AK, et al. Morphometric evolution of foramen magnum and variation in its shape and size: a study on Human dried skull. Int J Anat Res 2015;3(3):1399–1403. DOI: 10.16965/ijar. 2015.246.
Vinutha SP, Shubha R. Morphometry and sexual dimorphism in foramen magnum: a study of human skull bones. Int J Anat Res 2016;4(3):2593–2599.
Pires LAS, Teixeira AR, et al. Morphometric aspects of the foramen magnum and the orbit in Brazilian dry skulls. Int J Med Res Health Sci 2016;5(4):34–42.
Rohinidevi M, Vimala V. Morphometric analysis of foramen magnum and variations in its shape in dried human adult skulls. Int J Anat Res 2016;4(3):2670–2673. DOI: 10.16965/ijar.2016.298.
Fathima F, Babu KY. Evaluating the shape of foramen magnum and overlapping of occipital condyle on the foramen. Int J Sci Res 2016;5(9):1078–1082.
Devadas P, Rao MJ, et al. Study on the Morphometric analysis of the foramen magnum as an indicator for sex determination. Int J Anat Res 2017;5(3.1):4163–4167. DOI: 10.16965/ijar.2017.274.
Rajkumar, Kattimuthu P, et al. Morphometric analysis of foramen magnum of dry human skulls in North Indian population. Int J Anat Res 2017;5(1):3480–3484. DOI: 10.16965/ijar.2016.495.
Remya K, Rathnakar P, et al. Evaluation of foramen magnum in dry human skulls of Dakshina Kannada District. Int J Anat Res 2017;5(4.1):4488–4491.
Singh KC, Rai G, et al. Morphological variations of the foramen magnum in adult human dry skull in Eastern UP (India) Population. Int J Med Res 2017;3(2):205–208.
Arora S, Sharma SK, et al. Morphometry and surgical importance of foramen magnum. Int J Anat Res 2017;5(1):3464–3469.
Sampada PK, Poornima B, et al. Morphometric and Morphological study of foramen magnum in dried human skull bones. Int J Anat Res 2017;5(2.1):3682–3686. DOI: 10.16965/ijar.2017.139.
Ilhan P, Kayhan B, et al. Morphological analysis of occipital condyles and foramen magnum as a guide for Lateral Surgical Approaches. MOJ Anat and Physiol 2017;3(6):188–194.
Raikar NA, Meundi MA, et al. Sexual dimorphism in foramen magnum dimensions in the South Indian Population: a digital submentovertex radiographic study. J Forensic Dent Sci 2016;8:180–187. DOI: 10.4103/0975-1475.195104.
Mishra AK, Pandey SB, et al. Morphometric study of foramen magnum of skull in population of Uttar Pradesh. Int J Anat Res 2018;6(2.2): 5186–5190. DOI: 10.16965/ijar.2018.150.
Veeramani R, Manjunath KY, et al. Morphological and Morphometric study of variations in the shape and size of the foramen magnum of human skulls. Int J Anat Radiol Surgery 2018;7(2):1–8.
Suazo GIC, Russo PP, et al. Sexual Dimorphism in the foramen magnum dimensions. Int J Morphol 2009;27(1):21–23.
Gruber P, Henneberg M, et al. Variability of human foramen magnum size. The Anatomical Recrd 2009;292:1713–1719. DOI: 10.1002/ar.21005.
Lyrtzis C, Piagkou M, et al. Foramen Magnum, Occipital Condyles, and Hypoglossal canals Morphometry: Anatomical study with clinical implications. Folia Morphol 2016;76(3):446–457. DOI: 10.5603/FM.a2017.0002.
Chovalopoulou ME, Bertsatos A. Estimating sex of modern Greeks based on the foramen magnum region. J of Anthropology 2017; 1–7. DOI: 10.1155/2017/9129801.
Farid SA, Fattah IOA. Morphometric study of human adult occipital condyle, hypoglossal canal and foramen magnum in dry skull of modern Egyptians. Int J of Clinical and Developmental Anatomy 2018;4(1):19–26. DOI: 10.11648/j.ijcda.20180401.13.
Mahajan D, Agnihotri G, et al. An anatomical perspective of human occipital condyles and foramen magnum with neurosurgical correlates. Int J of Exp Clin Anatomy 2011;6(7):29–33.
Jain SK, Choudhary AK, et al. Morphometric evaluation of foramen magnum for sex determination in a documented North Indian sample. J Evol Med Dent Sci 2013;2(42):8093–8098. DOI: 10.14260/jemds/1425.
Kanchan T, Gupta A, et al. Craniometric analysis of foramen magnum for estimation of sex. Int J of Med and Health Sci 2013;7(7): 378–380.
Patel R, Mehta CD. Morphometric study of foramen magnum at the base of human skull in South Gujarat. IOSR J of Dental and Med Sci 2014;13(6):23–25. DOI: 10.9790/0853-13642325.
Shepur MP, Magi M, et al. Morphometric analysis of foramen magnum. Int J Anat Res 2014;2(1):249–255.
Ganapathy A, Sadeesh T, et al. Morphometric analysis of foramen magnum in adult human skulls and CT images. Int J Cur Res 2014;6(20):11–15.
Vedanayagam T, Sathyamurthy V. Sex determination from foramen magnum measurements-A regional study in Chennai, Tamil Nadu. Indian. J of Forensic and Community Medicine 2015;2(3):179–181.
Sahoo S, Giri SK, et al. Morphometric analysis of the foramen magnum and occipital condyles. Int J Pharm Sci Rev Res 2015;33(2): 198–204.
Khanday S, Chakaravarthy P. Morphology and Morphometry of foramen magnum. Int J of Current Res 2016;8(3): 27765–27767.
Jasuja VR, Kulkarni PG, et al. A Morphometric study of occipital condyles and foramen magnum in adult skull base in Western Maharashtra region of India. Int J Anat Res 2016;4(1):1846–1850. DOI: 10.16965/ijar.2015.349.
Naqshi BF, Shahdad S, et al. Morphological and Morphometric study of foramen magnum in dry human skulls of Kashmir. Global J for Res Analysis 2017;6(8):1–3.
Ashwini C, Khona P. A Morphometrical study of foramen magnum in adult human dried skull of South Indian Population. Int J Anat Res 2018;6(1.1):4831–4835. DOI: 10.16965/ijar.2017.477.
Feridoz J, Babu Y. Morphometric analysis of foramen magnum. Int J Sci Dev Res 2018;3(4):302–305.
Jaitley M, Phulambrikar T, et al. Foramen Magnum as a tool for sexual dimorphism: a cone beam computed tomography study. Indian J of Dental Res 2016;27:458–462. DOI: 10.4103/0970- 9290.195610.
Singh G, Talwar I. Morphometric analysis of foramen magnum in human skull for sex determination. Hum Bio Rev 2013;2(1):29–41.
Dubey A, Verma SK. The anatomy occipital condyles and foramen magnum and their surgical importance: a Morphometric study. Int J Anat Res 2017;5(2.1):3780–3783. DOI: 10.16965/ijar.2017.193.