The greater sciatic notch is a notch in the ilium, one of the bones that make up the human pelvis. It lies between the posterior inferior iliac spine (above), and the ischial spine (below). The sacrospinous ligament changes this notch into an opening, the greater sciatic foramen.Click to see full answer. People also ask, what is the function of the greater and lesser sciatic notches?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. The greater sciatic notch provides passage to many structures either above or below the piriformis muscle.One may also ask, what is the lesser sciatic notch? The lesser sciatic notch is a large notch in the pelvis below the ischial spine. The addition of the sacrospinous ligament above and the sacrotuberous ligament below converts the notch into the lesser sciatic foramen. Also to know is, why is the greater sciatic notch wider in females? The greater sciatic notch of the male hip bone is narrower and deeper than the broader notch of females. Because the female pelvis is adapted for childbirth, it is wider than the male pelvis, as evidenced by the distance between the anterior superior iliac spines (see Figure 4).How do you palpate sciatic notch?The sciatic nerve is best palpated at the midway point of a line from the ischial tuberosity to the greater trochanter of the femur; the tibial nerve where it bisects the popliteal fossa at the mid-point of the popliteal crease; and the common peroneal nerve where it passes behind the head of the fibula to wind around
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