The superficial transverse perineal muscle forms the posterior boundary of the urogenital triangle, stabilising the perineal body from the ischial tuberosities. It is one of the muscles repaired in obstetric perineal tear repair.
| Origin | Ischial tuberosity — medial surface, superficial perineal pouch |
|---|---|
| Insertion | Central perineal tendon (perineal body) |
| Nerve Supply | Pudendal nerve — perineal branch (S2-S4) |
| Blood Supply | Internal pudendal artery — perineal branch |
| Actions | Stabilises the perineal body; Anchors the perineal body to the ischial tuberosities |
|---|
The superficial transverse perineal muscles are identified in perineal tear repair as the posterior boundary of the urogenital triangle. Their disruption in severe perineal lacerations produces perineal body descent and contributes to pelvic floor dysfunction. In perineal body reconstruction after 4th degree obstetric tear, the superficial transverse perineal muscles are identified and the perineal body is reconstituted.
Palpated as a cord running transversely in the perineum between the ischial tuberosities.
Disruption of superficial transverse perineal muscles in obstetric perineal lacerations requiring repair to restore perineal body integrity.
