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

Jyothsna Patil, Ravindra S. Swamy, Mohandas K.G. Rao, Naveen Kumar, S. N. Somayaji

Research output: Contribution to journalArticlepeer-review


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.

Original languageEnglish
Pages (from-to)148-149
Number of pages2
JournalJournal of Clinical and Diagnostic Research
Issue number1
Publication statusPublished - 12-01-2014

All Science Journal Classification (ASJC) codes

  • Medicine(all)
  • Clinical Biochemistry


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