Transversus perinei superficialis muscle
| Transversus perinei superficialis muscle |
|---|
|
| Pelvic floor of man |
| origin |
| Sciatic tuberosity |
| approach |
| pelvic floor |
| function |
| Stabilization of the pelvic floor |
| Innervation |
| Pudendal nerve |
| Spinal segments |
| S2-S4 |
The transversus perinei superficialis muscle ("superficial transverse perineum muscle ") is a striated muscle of the pelvic floor and perineum . It rises on the ischial hump ( ischial tuberosity ) and sets the central tendon mirror of the pelvic floor and connects there with the muscle of the opposite side. In the area of attachment it lies in front of the external ani sphincter muscle and behind the bulbospongiosus muscle . With these two muscles, the muscle fibers occasionally cross over .
The variation in the transversus perinei superficialis muscle is relatively large, sometimes it is doubled, in other cases it is completely absent. It is innervated by the pudendal nerve , which comes from segments two to four of the cross part of the spinal cord .
The transversus perinei superficialis muscle serves to stabilize the pelvic floor.