Urogenital Triangle Flashcards
What are the 3 boundaries of the urogenital triangle
The two ischial tuberosities and the pubic symphysis
What are the fatty and membranous fascia layers called
Fatty = Camper's fascia Membranous = Scarpa's fascia
What is the Camper’s fascia continuous with
Ischiorectal fossa and the thigh
In the scrotum, what is the Camper’s fascia replaced with
Dartos smooth muscle of the scrotum
What is the membranous fascia termed in the pelvic region
Colles’ membrane
What is the colles’ membrane attached to
Posterior border of the urogenital diaphragm, and into the labia/scrotum
How many layers is the urogenital diaphragm made up of
3
Describe the 3 different layers of the urogenital diaphragm
Superior = fascia (deep) Middle = sphincter urethrae and deep transverse perineal muscles Inferior = fascia (superficial; perineal membrane)
What is left after the layers of the urogenital diaphragm fuse together
A small space between the layers called the deep perineal pouch
What nerve innervates the urogenital diaphragm
The pudendal (perineal) nerve
In females, what passes through the deep perineal pouch
- Vagina
2. Dorsal nerves of the clitoris
In males, what passes through the deep perineal pouch
- Membranous urethra
- Dorsal nerves of the penis
- Bulbourethral glands
- Penile arteries
Where is the superficial perineal pouch located
Between the perineal membrane, in the superficial fascia, and the skin
What 3 muscles are located within the superficial perineal pouch
- Ischiocavernosus
- Bulbospongiosus
- Superficial transverse perineal
How many bulbospongiosus muscles are present in males and females, respectively
Males = 1 (can have a solid mass of tissue surrounding the urethra of the penis) Females = 2 (need an opening for the vagina)
What different erectile tissue types are present in males and females
Males = Bulb of penis and the crura either side of the penis (corpuscavernosum) Females = Bulb of vestibule (with a space in the middle) and the crura either side
What do the crura contribute to in males and females, respectively
Males = the head of the penis Females = the top part of the clitoris
What is the perineal membrane
A small fibrous structure
What 3 structures attach to the perineal membrane
- External anal sphincter
- Bulbospongiosus
- Superficial transverse perineal muscles
Describe the different tissues of the penis, and what they are an extension of
- Corpus spongiosum (x1), extension of bulb
2. Corpus cavernosum (x2), extension of crura
What tissue does the urethra of the penis run through
The corpus spongiosum
What 2 nerves supply the majority of sensation to the pelvic area
- Pudendal nerve
2. Iliohypogastric nerve
What are the 4 main perineal branches of the internal pudendal artery in males
- Deep artery of the penis
- Dorsal artery of the penis
- Artery of bulb
- Artery of penis
What are the 4 sections of the male urethra
- Pre-prostatic
- Prostatic
- Membranous
- Penile (spongy)
What are the 4 main branches of the pudendal nerve in males
- Inferior rectal
- Perineal (superficial and deep branches)
- Scrotal branches
- Dorsal nerve of the penis
What is the root value of the pudendal nerve
S2, S3, S4
What tight piece of connective tissue helps to form the greater sciatic notch
Sacrospinous ligament
What are the 2 main branches of the pudendal nerve in females
- Perineal nerve
2. Dorsal nerve of the clitoris
