coccygeal plexus

anatomy

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June 24, 2026

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The coccygeal plexus is a small network of nerves formed by the ventral rami of spinal nerves S4, S5, and Coccygeal 1. These nerves arise to innervate the skin around the coccyx (tailbone) and the anus. The coccygeus muscle, located in the lower back, attaches to the sacrum and coccyx and plays a role in supporting the pelvic organs. The peripheral nervous system, which includes the coccygeal plexus, acts as a communication channel between the central nervous system and the rest of the body, relaying sensory and motor impulses.12

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human nervous system
Coccygeal plexus
The ventral rami of S₄, S₅, and Coc₁ form the coccygeal plexus, from which small anococcygeal nerves arise to innervate the skin over the coccyx (tailbone) and around the anus.
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The ventral rami of S₄, S₅, and Coc₁ form the coccygeal plexus, from which small anococcygeal nerves arise to innervate the skin over the coccyx (tailbone) and around the anus.
Read More