A bifid piriformis muscle with dual insertion.
A bifid piriformis muscle is described with the aberrant fascicle inserting into the trochanteric fossa along with the obturator internus and gemelli muscles. The sciatic nerve split to enclose the aberrant fascicle between its common peroneal and tibial components.
Saadeh
F A
FA
Department of Anatomy, American University of Beirut.
D000328:Adult; D006801:Humans; D008297:Male; D009132:Muscles / Q000002:abnormalities* / Q000033:anatomy & histology / Q000294:innervation; D010543:Peroneal Nerve / Q000033:anatomy & histology; D012584:Sciatic Nerve / Q000002:abnormalities / Q000033:anatomy & histology; D013979:Tibial Nerve / Q000033:anatomy & histology