IJAR.2018.339
Type of Article: Original Research
Volume 6; Issue 4.1 (October 2018)
Page No.: 5772-5777
DOI: https://dx.doi.org/10.16965/ijar.2018.339
ANATOMICAL VARIATIONS OF SCIATIC NERVE BIFURCATION IN HUMAN CADAVERS
D. Gangulappa 1, K. Shashi Kantha *2.
1 Associate professor, Department of Anatomy, Govt. Medical College, Ananthapuramu, Andhra Pradesh, India.
*2 Assistant Professor, Department of Anatomy, Kakatiya Medical College, Warangal, Telangana, India.
Address for Correspondence: Dr. K. Shashi Kantha, Assistant Professor, Department of Anatomy, Kakatiya Medical College, Warangal, Telangana, India. E-Mail: shashi.kashojjala@gmail.com
ABSTRACT:
Background: the sciatic nerve is largest and thickest nerve in human body. It originates from L4-S3 roots of sacral plexus. It consists of 2 components namely tibial and common peroneal nerves. It passes through greater sciatic foramen and appears in the gluteal region below piriformis muscle, passes along back of the thigh and divides into its terminal branches viz tibial and common peroneal, near the superior angle of popliteal fossa. This point of bifurcation into terminal branches may be variable which might be important for the clinicians.
Aim: studying variations of sciatic nerve bifurcation at different levels
Materials and methods- study conducted on 50 lower limbs, properly embalmed with formalin. The gluteal region dissected and the level of bifurcation of sciatic nerve is recorded.
Results: In 42(84%) limbs the sciatic nerve terminated at the superior angle of popliteal fossa.3 limbs (6%) showed high level bifurcation in the pelvis and both branches emerged separately in infra piriform compartment. In 2 limbs (4%) sciatic nerve divided in the gluteal region. In 3(6%) limbs sciatic nerve divided in the middle of the thigh.
Conclusion: knowledge of variation of sciatic nerve bifurcation helps the clinicians during intra muscular injections, popliteal and sciatic blocks, hip surgeries.
KEY WORDS: Sciatic Nerve, Bifurcation , Piriformis Muscle.
REFERENCES
- Saritha et al .anatomical variations in the bifurcation of sciatic nerve . a cadaveric study and its clinical implications, anatomy and Physiology 2012;2(5):1-4.
- Susan standring . Gray’s Anatomy 39th Edition. The Anatomical Basis of Clinical Practise 2005: pp -1403-04 &1456.
- Babinski MA, Machado FA, Costa WS. A rare variation in the high division of the sciatic nerve surrounding the superior gemellus muscle. European journal of 2003;41(1):41-2.
- Beaton L.E., Anson B., The relation of the sciatic nerve and its subdivisions to the Piriformis muscle. AnatRec 1937;70:1-5.
- Beaton L.E :The sciatic nerve and piriformismuscle : Their inter relations possible cause of coccodynia: J bone joint surg Am 1938;20:686-688.
- Tomaszewski et al : The surgical anatomy of sciatic nerve : A meta analysis. J orthop Res do I : 10, 1002/ Jor- 23186:2016.
- Mengstu Desalegn et al; Variations of sciatic nerve its exit in relation to Piriformis muscle in the North Ethopia. International journal of Pharma sciences and research. 2014;5(12):953-956.
- Ugrenovic et al: the level of sciatic nerve division and its relation to the piriformis muscle. VoJnosant: Pregl 2005;62(1):45-49.
- Satyajit Sangram et al; A study on the bifurcation of sciatic nerve with its clinical significance: Indian journal of basic and applied medical research(IJBAMR). june 2015;4(3):34-44.
- Yusuf Saleem Khan et al. A rare case of bilateral high division of sciatic nerve with unilateral divided piriformis and unusual high origin of genicular branch of common fibular nerve. International Journal of anatomical variations 2011;4:63-66.
- Shastrakar et:al Study of variation in the high division of sciatic nerve and its relationship with the piriformismuscle: Med Res Chron 2015;2(3):359-365.
- Patel S. et al : A variation in the high division of the sciatic nerve and its relation with piriformis muscle. National J Med Res 2011;1(2).
- A D. Shewale et al: Study of variation in the divisions course and termination of the sciatic nerve: JKIMSU 2013;2(1):62-68.
- Mengstu Desalegn Kiros et al: Anatomical variation in the level of bifurcation of the sciatic nerve in ethopia: Journal of experimental and clinical anatomy 2015;14(1):1-4.
- Ogeng’O JA et al: variant Anatomy of sciatic nerve in black Kenyan population. Folia morphol 2001;70(3):175- 179.
- Sabnis AS et al : Anatomical Variation of sciatic nerve bifurcation in human cadavers. Journal of clinical research letters, 2012;3(2):46-48.
- Bhattacharya S et al : Different neuro muscular variation in the Gluteal region. Int Jour AnatVar (IJAV) 2013;6:136-139.
- Dupin A.B.F et al: High division ofSciatic nerve associated with a double superior gamellus muscle. J.Morphol . Sci. 2017;34(3):134-136.
- Mohd Salahuddin Ansari et al: Anatomical Variations in the division and innervations of the sciatic nerve with its clinical consequences. International Journal of Anatomy, Radiology and Surgery.2016;5(3):Ao22-Ao25.
- Peter EtinEkanem et al: Variation of Sciatic nerve bifurcation in dissected cadavers from ethopia and the clinical implications- A case report. Int J Anat Res 2015;3(3):1341-44.
- Sanjay Kumar Yadav et al: Anatomical study of sciatic nerve and its variation. A cadaveric study in northern Karnataka region-Int J Bio Med Res: 2015;6(4):5267-5271.
- BirhaneAlemBerihu et al: Anatomical Variation in bifurcation and trifurcation of sciatic nerve and its implications in selected university in ethopia: Bio Med Control Research Notes 2015:8(633):1-7.
- Prakash et al: Variation in the high division of the sciatic nerve and relationship between the sciatic nerve and piriformis. Singapore Med J 2010;51(9):721.
- Guvencer M et at: Variation in the high division of sciatic nerve and relationship between sciatic nerve and piriformis. Turk NuroSurg 2009;19(2):139-144.
- Muthu Kumar et al; A Cadaveric study of scitic nerve and its level of bifurcation: Journal of Clinical and Diagnostic Research 2011;5(8):1502-04.
- Parziale JR et al The piriformis muscle syndrome AM.J 1996;25:819-823.
- Ronald D. Miller, Edited Miller’s Anesthesia Volume 2; 7th edition; Churchill Livingstone Elsevier 2010; pp-1659.