Coccygeus - Podcast Version 0:00 / 0:00 1x 0.25x 0.5x 0.75x 1x 1.25x 1.5x 1.75x 2x The coccygeus is a muscle of the pelvic floor. It is a small triangular muscle located posterior to the levator ani muscle group. Attachments: Originates from the ischial spines and inserts onto the inferior end of the sacrum and coccyx. Actions: Supports the pelvic viscera and flexes the coccyx. Innervation: Anterior rami of S4 and S5. Blood supply: Inferior vesical, inferior gluteal and pudendal arteries. Adapted from work by OpenStax [CC BY 4.0], via Wikimedia Commons Fig 1Superior (bird’s eye) view of the pelvic floor. Note the prerectal fibres of the puborectalis. Pro Feature - 3D Model You've Discovered a Pro Feature Access our 3D Model Library Explore, cut, dissect, annotate and manipulate our 3D models to visualise anatomy in a dynamic, interactive way. Learn More Frequent questions What is the coccygeus muscle? The coccygeus is a small, triangular muscle located in the pelvic floor, positioned behind the levator ani muscle group. It plays a crucial role in supporting pelvic organs. Where does the coccygeus muscle attach? The coccygeus originates from the ischial spines and inserts at the inferior end of the sacrum and coccyx. This positioning allows it to effectively support the pelvic viscera. What actions does the coccygeus muscle perform? The coccygeus muscle supports the pelvic viscera and flexes the coccyx. These actions are essential for maintaining pelvic stability and function. What is the innervation of the coccygeus muscle? The coccygeus is innervated by the anterior rami of the S4 and S5 spinal nerves. This nerve supply is vital for muscle contraction and function. What blood vessels supply the coccygeus muscle? The blood supply to the coccygeus muscle comes from the inferior vesical, inferior gluteal, and pudendal arteries. Adequate blood flow is important for the muscle's health and function. Rate This Article