ANATOMY
PELVIS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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For 4-hour
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For 4-s
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S2-S4
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L4-S1
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Detailed explanation-1: -The superior gluteal nerve is found in the lower pelvis and arises from the dorsal divisions of the L4, L5, and S1 nerve roots of the sacral plexus. The superior gluteal nerve is responsible for innervation of the gluteus medius, gluteus minimus, and tensor fasciae latae muscles.
Detailed explanation-2: -The superior gluteal nerve is formed from the posterior divisions of the anterior rami of L4, L5, and S1 spinal nerves. It gains access to the gluteal region by coursing over the superior border of piriformis muscle through the greater sciatic foramen.
Detailed explanation-3: -After exiting the pelvis the superior gluteal nerve enters the gluteal region and spirals up over the inferior border of the gluteus minimus muscle. The nerve then travels anteriorly and laterally in a plane between the gluteus medius and gluteus minimus muscles.
Detailed explanation-4: -The inferior gluteal nerve arises from the dorsal branches of the L5, S1, and S2 ventral rami. It leaves the pelvis via the greater sciatic foramen below the piriformis and divides into branches that enter the deep surface of the gluteus maximus (Mahadevan, 2008; Williams, 2005).