Ischiocavernosus

The structure indicated is the ischiocavernosus muscle. The ischiocavernosus muscle is one of three pairs of muscles in the superficial perineal pouch:

1. Ischiocavernosus
2. Bulbospongiosus
3. Superficial transverse perineal muscles

It originates from the inner aspect of the ischiopubic ramus and attaches on either side to the crura of the penis and clitoris.

Origin: Ischiopubic ramus – internal aspect

Insertion: Crus of penis and clitoris

Action: Stabilise erect penis

Innervation: Pudendal nerve

Learn more about the pelvic floor in this tutorial