A variation in the high division of the sciatic nerve and its relation with piriformis muscle-case report

Abstract

Sciatic nerve is a broad, thickest and the largest nerve of body, arising from sacral plexus. In our case, sciatic nerve already divided in pelvis, and common peroneal nerve came out above an undivided piriformis, tibial nerve below Piriformis. According to different study, it shows that there are many variations in sciatic nerve division especially in higher divisions. This knowledge is also very important for nurses and junior doctor to prevent deep intramuscular injection hazards in gluteal region.

Study of a Variation of Lumbosacral Plexus: Sciatic Nerve and Its Clinical Significance

“…The iliohypogastric nerve is the longest (210 mm) and the ilioinguinal nerve is the thinnest (1.2 mm) nerve of the lumbar plexus. 11 Gabrielli C et al, 12 found 13.7%, Prakash et al 13 , found 16.3%, Ogeng'o JA et al 14 , found 20.1%, Ugrenovic S et al 15 , found 4%, Pokorny D et al 16 , found 20.9%, Guvencer M et al 8 , found 48%, Patel S et al 6 , found 8.2%, Adibatti M et al 16 ., found 8%.…”

“…The common peroneal and tibial components can split from each other at different levels from their origin because the sciatic nerve is created when the vast dorsal component of the sacral plexus (common fibular nerve) and the ventral component (tibial nerve) travel downward close together. 4,6 A study on cadaveric study of variation in division of sciatic nerve was conducted in India and reported normal course of sciatic nerve in eighty five percent lower limbs. 7 Our study also reported that 87.50 percent of the study population with normal division.…”