Sciatic foramen - ANATOMY
Sciatic foramina - ANATOMY The sciatic foramen is a opening in the pelvis in the posterior aspect of the pelvis. There are 2 openings : -Greater sciatic foramen -Lesser sciatic foramen The greater sciatic foramen is separated by lesser sciatic foramen by a ligament called sacrospinous ligament . Greater sciatic foramen Contents Due to the presence of piriformis muscle the greater sciatic foramen is divided into 2 parts. They are : - Suprapiriform foramen -Infrapiriform foramina Contents of Suprapiriform foramina Superior gluteal artery , Superior gluteal vein , Superior gluteal nerve Contents of Infrapiriform foramen Sciatic nerve Inferior gluteal nerve Pudendal nerve Posterior femoral cutaneous nerve And nerves which supply obturator interus, quadratus femoris . Borders Superior : Anterior sacroiliac ligaments Inferior : Sacrospinous...