Unique formation of sciatic nerve below the piriformis muscle – A case report

Patil, Jyothsna and Swamy, Ravindra S and Rao, Mohandas KG and Kumar, Naveen and Somayaji, SN (2014) Unique formation of sciatic nerve below the piriformis muscle – A case report. Journal of Clinical and Diagnostic Research, 8 (1). pp. 148-149. ISSN 0973-709X

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Dorsal and ventral divisions of ventral rami of lower lumbar and sacral spinal nerve were found to pass ventral and dorsal to the piriformis muscle respectively. These divisions joined each other below the piriformis muscle to form sciatic nerve. This low formation of sciatic nerve was observed in distal part of left gluteal region of a 50-year-old male cadaver. The sciatic nerve thus formed passed caudally into back of thigh and divided into tibial and common peroneal nerves in the upper part of popliteal fossa. In addition, a communicating nerve from the sciatic nerve was found to join the common peroneal nerve in the popliteal fossa. Such variations may lead to piriformis syndrome or non-discogenic sciatica.

Item Type: Article
Uncontrolled Keywords: Sacral plexus; Tibial nerve,; Common peroneal nerve.
Subjects: Medicine > MMMC Manipal > Anatomy
Depositing User: KMC Manipal
Date Deposited: 24 Jan 2014 04:10
Last Modified: 24 Jan 2014 04:10
URI: http://eprints.manipal.edu/id/eprint/138488

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