It then crosses the ischial spine, reenters the pelvis through the lesser sciatic foramen, and pierces the pelvic surface of the obturator internus.
Continuing down the posterior side, the ischial tuberosity is a thick, rough surfaced prominence below the lesser sciatic notch.
When present it extends towards the ischioanal fossa travelling along the ischial ramus and fusing with the obturator fascia.
The ischial spine separates the greater and lesser sciatic foramina.
In front of the right ischium muscle fibres are present running from the ischial foot in the direction of the femur.
Avulsion fractures occur where muscles are attached: anterior superior and inferior iliac spines, ischial tuberosities, and ischiopubic rami.
It gives twigs to the muscles attached to the ischial tuberosity and anastomoses with the inferior gluteal artery.
Ischial containment sockets for amputees are issued on the basis of a clinical decision made by the multi-professional team at a national health service trust.
