Abstract
A variation in the course of sciatic nerve in relation to the piriformis muscle: a case report
Highlights
Non discogenic sciatica is a disease, where the sciatic nerve (SN) or its branches, the Common Peroneal Nerve (CPN) and the Tibial Nerve (TN) compressing against the piriformis muscle (PM) because of its anatomical relation to the PM. Understanding about these variations is important in early diagnosis of Piriformis syndrome (PS) in clinical medicine
Twenty seven cadavers (53 lower limbs) used for routine undergraduate dissections at the Department of Anatomy, Faculty of Medicine, University of Peradeniya, Sri Lanka, were studied and the course of the SN as it travels in relation to the PM was observed and classified according to the Beaton's and Anson's classification
Of the 53 lower limb specimens observed, there was 01 (1.88%) case, where the CPN was emerging through the piriformis muscle to begin with, while the TN passes below the PM (Type II of Beaton's and Anson's classification)
Summary
Chandrasiri DACT1*, Patabandige DJ1, Ekanayaka EADA1, Dissanayaka JK1 1Department of Anatomy, Faculty of Medicine, University of Peradeniya. Non discogenic sciatica is a disease, where the sciatic nerve (SN) or its branches, the Common Peroneal Nerve (CPN) and the Tibial Nerve (TN) compressing against the piriformis muscle (PM) because of its anatomical relation to the PM.
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