Coccygeus muscle
| Coccygeus muscle |
|---|
|
| Pelvic floor muscles |
| origin |
| Sciatic spine |
| approach |
| Os coccygis |
| function |
| supports the levator ani muscle
fixes the tailbone closes the pelvis dorsally (together with the piriformis muscle) |
| Innervation |
| Coccygeus nerve (coccyge plexus) |
| Spinal segments |
| S5 to Co2 |
The coccygeus muscle ( Latin for "coccyx muscle") is a striated muscle ( skeletal muscle ) of triangular, flat shape. He is behind the levator ani , takes its origin from the ischial spine of the ischium and sets the coccyx ( tailbone on). Its muscle fibers are usually fused with the sacrospinal ligament . The muscle is not present in all individuals. The coccyx is innervated by the coccyx nerve .
function
The coccygeus muscle strengthens the effect of the levator ani muscle in the pelvis diaphragm and fixes the coccyx. In addition, it closes the pelvis dorsally together with the piriformis muscle .
literature
- Ulrike Bommas, Philipp Teubner, Rainer Voss: Anatomy and Embryology - short textbook. 2nd Edition. Thieme, Stuttgart 2006, ISBN 3-13-135532-8 .
- Michael Schünke , Erik Schulte , Udo Schumacher : Prometheus. Anatomy Learning Atlas. General anatomy and motor system . 4th, revised. and exp. Ed. Thieme, Stuttgart 2014, ISBN 978-3-13-139524-5 .