ANATOMY
PELVIS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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sciatic nerve
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piriformis muscle
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gluteal vessels
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internal obturator muscle
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Detailed explanation-1: -Sciatic Nerve. The sciatic nerve is formed within the pelvic cavity and comprises the ventral rami of L4-S3. It exits through the greater sciatic foramen inferior to the piriformis and superior to the superior gemellus muscles with documented anatomic variability (Smoll, 2010).
Detailed explanation-2: –The following structures pass through the greater sciatic foramen below the piriformis except:-Sciatic nerve.
Detailed explanation-3: -The nerve to the obturator internus (L5, S1, S2) leaves the pelvis below the piriformis, supplies the superior gemellus, and then passes through the lesser sciatic foramen to the obturator internus.
Detailed explanation-4: -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.