Greater sciatic notch
Encyclopedia
Above the ischial spine
is a large notch, the greater sciatic notch, converted into a foramen by the sacrospinous ligament
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It transmits the Piriformis, the superior and inferior gluteal vessels and nerves, the sciatic and posterior femoral cutaneous nerves, the internal pudendal vessels, and the nerves to the Obturator internus and Quadratus femoris.
Of these, the superior gluteal vessels and nerve pass out above the Piriformis, the other structures below it.
Ischial spine
From the posterior border of the body of the Ischium there extends backward a thin and pointed triangular eminence, the ischial spine, more or less elongated in different subjects.It can serve as a landmark in pudendal anesthesia.-Surfaces:...
is a large notch, the greater sciatic notch, converted into a foramen by the sacrospinous ligament
Sacrospinous ligament
-External links: - "Posterior view of the bones and ligaments of the hip joint."*...
.
It transmits the Piriformis, the superior and inferior gluteal vessels and nerves, the sciatic and posterior femoral cutaneous nerves, the internal pudendal vessels, and the nerves to the Obturator internus and Quadratus femoris.
Of these, the superior gluteal vessels and nerve pass out above the Piriformis, the other structures below it.