Question
Which of the following nerve is related to the marked (red) area in the given image?
| A. |
Obturator Nerve
|
| B. |
Sciatic Nerve
|
| C. |
Pudendal Nerve
|
| D. |
Femoral Nerve
|
Show Answer
|
Correct Answer � C
Explanation
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|
Answer C) Pudendal Nerve
Marked structures is Ischial Spine– Superior view
Pudendal Nerve
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The pudendal nerve is formed from the sacral plexus – a network of nerve fibres located on the posterior pelvic wall.
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It arises from the ventral rami (anterior divisions) of the spinal nerves S2, S3 and S4.
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After its formation, the pudendal nerve descends and passes between the piriformis and ischiococcygeus muscles.
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It leaves the pelvis through the lower part of the greater sciatic foramen.
It then crosses the sacrospinous ligament (close to its insertion to the ischial spine), and then re-enters the pelvis through the lesser sciatic foramen.
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