Roof Of Lesser Sciatic Foramen

The greater sciatic foramen is divided into two compartments by the piriformis muscle namely the infrapiriformic and suprapiriformic compartments below and above the muscle respectively.

Roof of lesser sciatic foramen.

The greater sciatic notch provides passage to many structures either above or below the piriformis muscle. Below the ischial spine is a small notch the lesser sciatic notch. It is formed by the sacrotuberous and sacrospinous ligaments. Internal pudendal artery and vein n.

The lesser sciatic foramen is a small opening which provides communication between the pelvis and the gluteal region. The sacrospinous ligament forms the inferomedial border of the greater sciatic foramen. The tuberosity of the ischium superior. Lesser sciatic notch anteriorly ischial spine anterosuperiorly and ischial tuberosity anteroinferiorly sacrospinous ligament superiorly sacrotuberous ligament posteriorly.

The greater sciatic foramen is divided into two parts by the presence of the piriformis muscle the suprapiriform and infrapiriform foramina. Identify the greater and lesser sciatic foramina and ischial spine on the pelvis shown. Greater lesser sciatic foramen may 21 2018 anatomy lower limb structres passing through greater sciatic foramen structures passing through lesser sciatic foramen poonam kharb janghu advertisements. The sacrospinous ligament contributes to the superior border or roof of the lesser sciatic foramen.

A mnemonic to remember the structures passing through the lesser sciatic foramen is. The placement of the relatively robust sacrotuberous ligament forms the lesser sciatic foramen from the osseous lesser sciatic notch. Tendon of obturator internus. It is smooth coated in the recent state with cartilage the surface of which presents two or three ridges corresponding to the subdivisions of the tendon of the obturator internus which winds over it.

Name two muscles that attach onto the ischial spine. The greater sciatic foramen is an opening foramen in the posterior human pelvis. The lesser sciatic foramen has the following boundaries. The lesser sciatic foramen provides a communication between the perineum of the pelvis and the gluteal region.

The lesser sciatic notch is formed by the sacrotuberous ligament and the sacrospinous ligaments. The sacrospinous ligament separates the greater sciatic and lesser sciatic foramina. It lies inferiorly to the pelvic floor.