Greater sciatic foramenLesser sciatic foramenObturator foramenSacrotuberous ligamentSacrospinous ligamentIschial tuberosityIschiopubic ramusPubic tubercleAnterior superioriliac spineMargin of pelvic inletA
Margin of pelvic inletPiriformis muscleObturator internus muscleB
Fig. 5.6 Pelvic outlet.