Type of Article:  Original Research

Volume 9; Issue 4 (December 2021)

Page No.: 8156-8159

DOI: https://dx.doi.org/10.16965/ijar.2021.173

Variations in Course and Branching of Sciatic Nerve and it’s Relation to Pyriformis Syndrome

Patel Dinesh K, Shinde Amol A *.

Associate Professor, Department of Anatomy, Dr.D.Y.Patil Medical College,  Dr.D.Y.Patil Vidyapeeth, Pimpri, Pune, Maharashtra, India.

Corresponding Author: Dr. Shinde Amol A, Associate Professor, Department of Anatomy, Dr.D.Y.Patil Medical College,  Dr.D.Y.Patil Vidyapeeth, Pimpri, Pune – 411061, Maharashtra, India. Ph- 9422242536 E-Mail: amol9267@gmail.com        


Background: Sciatic nerve is a branch of sacral plexus. It passes below the pyriformis and divides in the popliteal fossa. Higher division and relation of sciatic nerve to pyriformis have been documented. Beaton and Anson have classified relation of sciatic nerve to pyriformis. The aim of this study is to find incidence of variant anatomy of sciatic nerve as per Beaton and Anson classification.

Materials and methods: 48 formalin embalmed lower limbs used for regular anatomy teaching were used. Branching and course of sciatic nerve was observed in gluteal region, thigh and popliteal fossa.

Observations: As per Beaton and Anson classification, we found 81.2% showed type A  or normal arrangement. Type B variation was seen in 14.6% while 4.2% showed type D variation.

Conclusion: Variations in branching of sciatic nerve and it’s relation to pyriformis muscle are important from point of view of Surgeons and Anaesthetists. Knowledge of these variations will help reducing block failures in cases of sciatica, pyriformis syndrome and hip replacement surgeries.

KEY WORDS: Sciatic nerve, Sacral plexus, Pyriformis Syndrome, Hip replacement.


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Cite this article: Patel Dinesh K, Shinde Amol A. Variations in Course and Branching of Sciatic Nerve and it’s Relation to Pyriformis Syndrome. Int J Anat Res 2021;9(4):8156-8159. DOI: 10.16965/ijar.2021.173