The coccygeal plexus is a group of nerves located in the lower part of the spinal cord, near the tailbone. It is responsible for transmitting signals to the muscles in this area, including the rectum and anus. Synonyms for this complex structure include the caudal plexus, the sacrococcygeal plexus, and the pelvic plexus. Other related terms might include the pudendal nerve, which innervates the external genitalia, and the sciatic nerve, which runs down the back of the leg and can be affected by conditions of the coccygeal plexus. Understanding the different terms used to refer to this area of the body can help in diagnosis and treatment of related disorders.