El iliococcígeo es un músculo del suelo pélvico. Forma la parte posterolateral del grupo muscular elevador del ano. Inserciones: se origina en las espinas isquiales y en el arco tendinoso posterior de la fascia obturadora interna. Se inserta en el coxis, el cuerpo perineal y el ligamento anococcígeo. También se integra con las fibras del músculo contralateral en la línea media del suelo pélvico. Acciones: eleva el suelo pélvico y el canal anorrectal. Inervación: nervio al elevador del ano y ramas del nervio pudendo. Irrigación sanguínea: arterias glútea inferior, vesical 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. Obsérvese 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 iliococcygeus muscle? The iliococcygeus is a pelvic floor muscle that forms part of the levator ani group, specifically located posterolaterally. It plays a crucial role in supporting pelvic organs and maintaining continence. What are the attachments of the iliococcygeus muscle? The iliococcygeus originates from the ischial spines and the posterior tendinous arch of the internal obturator fascia. It inserts into the coccyx, perineal body, and anococcygeal ligament, and connects with the contralateral muscle fibres at the pelvic floor's midline. What actions does the iliococcygeus facilitate? The iliococcygeus muscle primarily elevates the pelvic floor and the anal canal. This action is essential for proper function during activities such as defecation and childbirth. Which nerves innervate the iliococcygeus muscle? The iliococcygeus is innervated by the nerve to the levator ani and branches from the pudendal nerve. This innervation is vital for muscle contraction and coordination within the pelvic region. What is the blood supply to the iliococcygeus muscle? The blood supply to the iliococcygeus muscle comes from the inferior gluteal, inferior vesical, and pudendal arteries. This vascularisation is important for maintaining the muscle's health and function. Rate This Article