Lecture 46: Male and Female External Genitalia-Urogenital Triangle, Urogenital Diaphragm, Pouches

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: Essay Questions : When inserting a a catheter into the male urethra, the normal angulation of the membranous urethra can result in a tear of the urethra and the inferior fascia of the urogenital diaphragm, and resulting extravasation of urine from the deep pouch to the superficial perineal pouch. With regards to the injury described: Discuss the boundaries of Scarpa’s fascia and containment of urine within the superficial pouch in the human male. : True False Questions : Extravasation of urine into the potential space defined by Scarpa's fascia and its derivatives results in urine accumulating between a layer of membranous tela subcutanea and a layer of deep fascia. : In the case of extravasation of urine into the potential space defined by Scarpa's fascia and its derivatives; urine will accumulate between Scarpa's fascia and deep fascia of the anterolateral abdominal wall. : In the case of extravasation of urine into the potential space defined by Scarpa's fascia and its derivatives; urine will accumulate between Scarpa's fascia fascia lata of the anteromedial thigh. : In the case of extravasation of urine into the potential space defined by Scarpa's fascia and its derivatives; urine will accumulate between dartos fascia of the scrotum and external spermatic fascia. : In the case of extravasation of urine into the potential space defined by Scarpa's fascia and its derivatives; urine will accumulate between superficial perineal fascia and the inferior fascia of the urogenital diaphragm (perineal membrane). : In the case of extravasation of urine into the potential space defined by Scarpa's fascia and its derivatives; urine will accumulate between Colles' fascia and Buck's fascia of the penis. : In the case of extravasation of urine into the potential space defined by Scarpa's fascia and its derivatives; urine will accumulate between superficial perineal fascia and the inferior fascia of the urogenital diaphragm of the female perineum. : Derivatives of Scarpa's fascia in male and female attach to the periosteum of the conjoint rami and to the posterior free edge of the urogenital diaphragm. : The fundiform ligament of the penis or clitoris is a derivative fascia, whereas the suspensory ligament of the penis or clitoris is a derivative of deep fascia. : The potential space defined by Scarpa's fascia extends superior to the level of the umbilicus (finger like extensions) and inferior to a level about two centimeters inferior to the inguinal ligament. : The cura of the penis and clitoris are attached to the perineal membrane and the periosteum of the conjoint rami. : The corpora spongiosum of the male extends to and elaborates the glans, whereas the corpora spongiosum of the female ends at the anterior vestibule and does not contribute to the clitoris. : Overlying the bulb of the penis and the bulb of the vestibule is the bulbospongiosus muscle. : Overlying the crus of the penis and the crus of the clitoris is the ischiocavernosus muscle. : The muscles of the deep pouch and the muscles of the superficial pouch receive somatic innervation by branches of the pudendal nerve. : The deep dorsal vein of the penis is deep to Buck's fascia, whereas the superficial vein is superficial to Buck's fascia and within Colles' fascia. : The deep dorsal vein of the penis enters the pelvis by way of a gap between the arcuate ligament and the deep transverse perineal ligament to then drain into the prostatic venous plexus. : The deep dorsal vein of the clitoris enters the pelvis by way of a gap between the arcuate ligament and the deep transverse perineal ligament to then drain into the vesicle venous plexus. : The dorsal artery and vein of the male are deep to Buck's fascia and superficial to tunica albuginea of the corpora cavernosa. : The greater vestibular gland (Bartholin's) empties into the vaginal opening, whereas the paraurethral glands empty into the urethral opening. : The bulbourethral glands are located in the deep pouch, whereas the bulbourethral ducts empty into the spongy urethra located in the superficial pouch. : The superficial transverse perineal muscle is within the superficial pouch (debated), whereas the deep transverse perineal muscle is within the deep pouch (not debated). : The anterior labial nerves are from the ilioinguinal and genitofemoral nerves, whereas the posterior labial nerves are from the superficial perineal branch of the pudendal nerve.

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