What is Infrapiriform foramen?

What is Infrapiriform foramen?

It is a part of the greater sciatic foramen (foramen ischiadicum majus). It contains: inferior gluteal nerve. inferior gluteal vessels.

What passes through sciatic foramen?


  • inferior gluteal nerve.
  • pudendal nerve.
  • sciatic nerve.
  • posterior femoral cutaneous nerve.
  • nerve to obturator internus.
  • nerve to quadratus femoris.

Which of the following nerves pass through the greater sciatic foramen?

The pudendal nerve derives from the sacral plexus (S2–4) and enters the gluteal region via the greater sciatic foramen. The nerve travels through the pelvis around the ischial spine, between the sacrospinous and the sacrotuberous ligaments.

What important structures pass through the greater sciatic notch?

Is piriformis a muscle?

The piriformis muscle is a flat, band-like muscle located in the buttocks near the top of the hip joint. This muscle is important in lower body movement because it stabilizes the hip joint and lifts and rotates the thigh away from the body.

How do you palpate sciatic nerve?

You may have to palpate a great distance along the nerve Sciatic nerve in the buttock Posterior aspect of greater trochanter Lateral aspect of ischial tuberosity. In between these two structures, find the groove. Following the nerve into the thigh, you can add knee extension, dorsiflexion or spinal flexion.

What structures form the greater sciatic foramen?

The greater sciatic foramen is an opening (foramen) in the posterior human pelvis. It is formed by the sacrotuberous and sacrospinous ligaments. The piriformis muscle passes through the foramen and occupies most of its volume. The greater sciatic foramen is wider in women than in men.

What ligament makes up the greater sciatic foramen?

The greater sciatic foramen is bounded, in front and above, by the posterior border of the hip bone; behind,by the sacrotuberous ligament; and below, by the sacrospinous ligament. It is partially filled up, in the recent state, by the Piriformis which leaves the pelvis through it.

Which ligament converts greater sciatic notch into foramen?

sacrospinous ligament
Anatomical Parts Above the ischial spine is a large notch, the greater sciatic notch, converted into a foramen by the sacrospinous ligament.