Coccygeus
Hips & glutes
Deep muscle — it lies under other muscles. X-ray makes the muscles over it see-through.
- Origin
- Ischial spine and the sacrospinous ligament
- Insertion
- Side of the coccyx and the lowest part of the sacrum
- Action
- Supports the pelvic floor and pulls the coccyx forward
- Nerve supply
- Anterior rami of the sacral spinal nerves (S4–S5)
A triangular muscle at the back of the pelvic floor, behind the levator ani. Together they form the muscular floor that supports the pelvic organs.
Coccygeus anatomy page →