Superficial Perineal Pouch

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The contents of the superficial perineal pouch are as follows:
1. The posterior labial nerve is a branch of the pudendal nerve.
2. The posterior labial artery is a branch of the internal pudendal artery.
3. The superficial transverse perineal muscles form the posterior boundary of the superficial pouch. These muscles arise from the ischiotuberosities and insert into the perineal body. Their function is to stabilize the perineum.

4. The bulbospongiosis muscles are exposed by cutting away the labia minora, and they cover the bulb of the vestibule. They arise from the perineal body and insert into the dorsum of the clitoris. Their function is to close the vaginal orifice.

5. The vestibular bulbs consist of erectile tissue that lies on each side of the vaginal orifice and are attached to the perineal membrane overlapping the greater vestibular glands (of Bartholin) posteriorly. The bulbs are united anteriorly by a plexus of veins (the commissure) between the urethra and the clitoris. The commissure is attached to the glans of the clitoris by a thin strip of erectile tissue.

6. The ischiocavernosus muscles cover the two crura of the clitoris and arise from the ischial ramus and insert into the crura of the clitoris. They cause erection of the clitoris. The clitoris itself has a free glans and a fixed body composed of two corpora cavernosa, which attach to the ischial pubic rami by two crura.

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