The ventral rami of the 4th and 5th sacral nerves and the coccygeal nerve form a delicate plexus on the coccygeus muscle, known as the coccygeal plexus.
Anatomy
From the coccygeal plexus arise the anococcygeal nerves, which provide sensory innervation to the skin over the coccyx and between the coccyx and anus[^1].
Clinical Relevance
A lesion of the coccygeal plexus or the anococcygeal nerves can lead to coccygodynia[^2].