El coccígeo es un músculo del suelo pélvico. Es un pequeño músculo triangular situado en la parte posterior del grupo muscular elevador del ano. Inserciones: se origina en las espinas isquiáticas y se inserta en el extremo inferior del sacro y el cóccix. Acciones: sostiene las vísceras pélvicas y flexiona el coxis. Inervación: ramos anteriores de S4 y S5. Irrigación sanguínea: arteria vesical inferior, glútea inferior y pudenda. Adapted from work by OpenStax [CC BY 4.0], via Wikimedia Commons Fig. 1: Vista superior (vista de pájaro) del suelo pélvico. Observa las fibras prerrectales del músculo puborrectal. 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 coccigeus muscle? The coccigeus muscle is a small triangular muscle located at the back of the pelvic diaphragm. It plays a crucial role in supporting the pelvic viscera and flexing the coccyx. Where does the coccigeus muscle attach? The coccigeus muscle originates from the ischial spines and attaches to the lower end of the sacrum and the coccyx. This positioning helps maintain pelvic stability. What actions does the coccigeus muscle perform? The primary actions of the coccigeus muscle are to support the pelvic organs and flex the coccyx. These functions are essential for proper pelvic floor mechanics. How is the coccigeus muscle innervated? The coccigeus muscle receives its nerve supply from the anterior rami of the S4 and S5 spinal nerves. This innervation is vital for its motor function. What is the blood supply to the coccigeus muscle? The coccigeus muscle is primarily supplied by the inferior vesical artery, inferior gluteal artery, and pudendal artery. This vascularisation is important for muscle health and function. Rate This Article