Final answer:
The coccygeal plexus innervates the skin over the coccyx and supplies the levator ani and muscles surrounding the coccyx.
Step-by-step explanation:
The coccygeal plexus is a small nerve plexus located near the coccyx or the tailbone. It is comprised of the ventral rami of the coccygeal nerve and the fifth sacral nerve. Although it is not as well-known as the other plexuses in the body, such as the cervical, brachial, lumbar, and sacral plexuses, the coccygeal plexus serves an important role. This plexus innervates the skin over the coccyx and supplies a small muscle in the pelvic floor known as the levator ani, as well as the muscles surrounding the coccyx.