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IJAR.2017.253

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Type of Article:  Original Research

Volume 5; Issue 3.1 (July 2017)

Page No.: 4073-4077

DOI: https://dx.doi.org/10.16965/ijar.2017.253

STUDY ON THE ANATOMICAL VARIATIONS OF THE ANTERIOR PART OF THE CIRCLE OF WILLI’S IN ADULT HUMAN CADAVERS

M Janardhan Rao 1, P Devadas *2, M Yesender 3, B H Shiny Vinila 4.

1 Associate Professor, Department of Anatomy, Kamineni academy of medical sciences and research centre, Hyderabad, Telangana, India.

*2 Associate Professor, Department of Anatomy, Kamineni Institute of Medical Sciences, Narketpally, Telangana, India.

3 Professor, Department of Anatomy, Kamineni academy of medical sciences and research centre, Hyderabad, Telangana, India.

4 Senior Lecturer, Department of Anatomy, Panineeya Mahavidyalaya Institute of Dental Sciences and Research Center, Hyderabad, Telangana, India.

Corresponding author: Dr P Devadas, Associate Professor, Department of Anatomy, Kamineni Institute of Medical Sciences, Narketpally, Nalgonda, Telangana, India. Contact number: 9515020692 E-Mail: drdevdas.anat@gmail.com

ABSTRACT:

Introduction: The anterior part of the circle of Willi’s is made up of anterior cerebral arteries and anterior communicating artery. The variations of the anterior part of the circle of Will’s  may lead to some clinical conditions like Cerebrovascular diseases such as stroke, aneurysms, internal carotid artery occlusion and migraine. The present study was aimed to find out the incidence of the variations of the anterior part of the circle of Willi’s in the Telangana Population.

Materials and Methods: A total of 40 adult brains (30 male and 10 female) were obtained from the dissection and the anterior part of the circle of Willi’s were studied and the observed variations of the middle cerebral artery, the anterior cerebral artery and anterior communicating artery were recorded and photographed.

Results: Variations were observed in 27.5% specimens in which  7.5% specimens had double anterior communicating arteries, 7.5% specimens shown union and separation of anterior cerebral arteries, 2.5% specimens had an aneurysm of the anterior cerebral artery and anterior communicating artery, 2.5% specimen shown triple anterior cerebral artery, 5% specimens had the hypoplasia of anterior cerebral artery and 2.5% specimens had duplication of middle cerebral artery.

Conclusion: Knowledge of the anatomical variations of the anterior part of the circle of Willi’s is of great value to the neurosurgeons while dealing with cerebrovascular stroke, aneurysms of the anterior cerebral artery, anterior communicating artery, and middle cerebral artery.

Key words: Anterior cerebral artery, Anterior communicating artery, Aneurysms, Brain, Middle cerebral artery.

REFERENCES

  1. Alpers BJ, Berry RG, Paddison RM. Anatomical studies of the circle of Willis in normal brain. Arch Neurol Psychiat.1959;81:409-18.
  2. Orlando GE, Ruggiero S, Orlandin SZ, Gulisano M. Blood vessel size of circulus arterious cerebri (Circle of Willis): A statistical research on 100 human subjects. Acta Anatomica. 1985;123:72-76.
  3. Puchades-Orts, Nombela-Gomez M, Ortuno-Pacheco G. Variation in form of circle of Willis: some anatomical and embryological considerations. Anatomical record. 1975;185:119-124
  4. Purves D, Augustine GJ, Fitzpatrick D, et al., editors. The Blood Supply of the Brain and Spinal Cord. Neuroscience. 2nd edition. Sunderland (MA): Sinauer Associates; 2001. Available from: https://www.ncbi.nlm.nih.gov/books/NBK11042/
  5. Berk ME. Some anomalies of the circle of Willis. British Journal of Anatomy. 1961;34: 221-26.
  6. Milenkovic Z, Vucetic R, Puzic M. Asymmetry and anomalies of the circle of Willis in fetal brain. Microsurgical study and functional remarks. Surg Neurol. 1985; 24(5): 563 – 70.
  7. Stehbens WE. Etiology of intracranial berry aneurysms. J Neurosurg. 1989;70(6):823-31.
  8. Yamauchi H, Kudoh T, Sugimoto K, Takahashi M, Kishibe Y, Okazawa H. Pattern of collaterals, type of infarcts, and hemodynamic impairment in carotid artery occlusion. J Neurol Neurosurg Psychiatry. 2004;75(12):1697-1701.
  9. Lazzaro MA, Ouyang B, Chen M. The role of circle of Willis anomalies in cerebral aneurysm rupture. J Neuro intervent Surg. 2011; doi: 10. 1136/ jnis. 2010.004358.
  10. Cucchiara B, Wolf RL, Nagae L, Zhang Q, Kasner S et al. Migraine with aura is associated with an incomplete circle of Willis: Results of a prospective observational study. 2013; PLoS ONE 8(7): e71007. doi: 10.1371/ journal. pone.0071007.
  11. Kamath S. Observations on the length and diameter of the vessels forming the circle of Willis. J Anat.1981;133:419-23.
  12. Fawcett E, Blachford JV. The circle of Willis: An examination of 700 specimens. J Anat and Physiol. 1905;40:63-70.
  13. Iqbal. A comprehensive study of the anatomical variations of the circle of Willis in adult human brains. Journal of Clinical and Diagnostic Research. 2013;7(11):2423-2427.
  14. Vaibhav V. Sande, Sanjay P. Wanjari, Suvarna V. Sande. Variations of the anterior part of circle of Willis in human cadavers: a dissection study. International Journal of Advances in Medicine. 2016;3(2):353-356.
  15. Sandhya Arvind Gunnal, Rajendra Namdeo Wabale, Mujeebuddin Samsamuddin Farooqui. Variations of anterior cerebral artery in human Cadavers. Neurology Asia 2013;18(3):249-259
  16. Baptista AG. Studies on the arteries of the brain II. The anterior cerebral artery: Some anatomic features and their clinical implications. Neurology. 1963;13:825-35.
  17. Perlmutter D, Rhoton AL. Microsurgical anatomy of the anterior cerebral – anterior communicating – recurrent artery complex. J Neurosurg. 1976;45:259-72.
  18. Riggs HE, Rupp C. Variation in form of circle of Willis. The relation of the variations to collateral circulation: anatomic analysis. Arch Neurol. 1963;8:24-30.
  19. Kapoor K, Kak VK. Incidence of intracranial aneurysms in northwest Indian population. Neurology. India. 2003;51(1):22-26.
  20. Hoe Young Chang, M.D., Myoung Soo Kim, M.D. Middle Cerebral Artery Duplication: Classification and Clinical Implications. J Korean Neurosurg Soc. 2011;49:102-106.
  21. M Komiyama, H Nakajima, M Nishikawa and T Yasui. Middle cerebral artery variations: duplicated and accessory arteries. American Journal of Neuroradiology. 1998;19(1):45-49.
  22. Kai Y, Hamada J, Morioka M, Yano S, Kudo M, Kuratsu J: Treatment of unruptured duplicated middle cerebral artery aneurysm: case report. Surg Neurol.  2006;65:190-193.

Cite this article: M Janardhan Rao, P Devadas, M Yesender, B H Shiny Vinila. STUDY ON THE ANATOMICAL VARIATIONS OF THE ANTERIOR PART OF THE CIRCLE OF WILLI’S IN ADULT HUMAN CADAVERS. Int J Anat Res 2017;5(3.1):4073-4077. DOI: 10.16965/ijar.2017.253