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Coccygeal plexus
Last reviewed: 23.04.2024
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The coccygeal plexus (plexus coccygeus) is formed by the fibers of the anterior branches of the fourth and fifth sacral (SIV-V) and anterior branch of the coccygeal (CoI) spinal nerves. The plexus is located at the beginning and on the anterior surface of the coccygeal muscle and on the sacrococcygeal ligament. The anal-coccygeal nerves (nn. Anococcygei) leaving the coccygeal plexus follow the anterior surface of the coccygeal muscle to the end of the coccyx. They infect the skin in the region of the coccyx and anus. The muscle branches of this plexus innervate the coccygeal muscle and the back of the muscle that lifts the anus.
The coccygeal nerve (n.coccygeus) is formed by the anterior branches of the nerves SV and CoI-II, and is located on both sides of the sacrum in front of the coccygeal muscle and lig. Sacrospinosum. From this plexus the nerves to the muscles of the pelvic floor, the coccygeal muscle and the muscle lifting the anus pass away. Sensitive fibers provide the skin between the coccyx and anus.
When the sexual nerve and coccygeal plexus are affected, there are disorders of urination, defecation and sexual activity, anal reflex with hypoesthesia falls in the accompanying zones.
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