Anatomy of the Perineum 3 Flashcards

Define the superficial and deep perineal pouches and identify their contents. Describe Colles' fascia and its attachments and relations.

1
Q

What is the deep perineal pouch?

A
  • Narrow space between two layers of the UG diaphragm
    • interior fascia of the urogenital diaphragm (perineal membrane) below (superficial)
    • superior fascia of the UG diaphragm above (deep)
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2
Q

What are the contents of the deep perineal pouch?

A
  • Deep transverse perineal muscle (skeletal muscle)
  • External urethral sphincter (skeletal muscle)
  • Membranous urethra
  • Bulbourethral gland (in the male)
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3
Q

What is the superficial perineal compartment?

A
  • A pouch of the superficial body wall
    • scortum in the male
    • labia majora in the female
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4
Q

What are the boundaries of the superficial perineal compartment?

A
  • Enclosed by Colle’s fascia (in the male)
    • membranous layer continuous with Scarpa’s fascia of the abdominal wall
  • Blood or urine in this space cannot pass into the high or anal region
    • only to the scrotum, around the penis, and upward to the abdominal wall between its superficial and deep components
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5
Q

What are the structures found in the superficial perineal compartment in the male?

A
  • Penis (attached via left and right crus and bulb)
  • Bulbospongiosus muscle (skeletal)
  • Ischiocavernosus muscle (around crura, skeletal)
  • Superficial transverse pineal muscle (skeletal)
  • Bulbourethral gland found in the deep pouch
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6
Q

What are the structures found in the superficial perinal compartment in the female?

A
  • Clitoris (with a body and left and right crus)
  • Bulbospongiosus muscle (skeletal)
  • Ischiocavernosus msucles (around crura, skeletal)
  • Vestibular bulb (within bulbospongiosus muscle)
  • Greater vestibular gland
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7
Q

What are the functions of the muscles found in the superficial perineal compartment?

A
  • Superficial (and deep) transverse perineal muscles
    • help stabilize the perineal body
  • Bulbospongiosus
    • expels semen and empties last drops of urine in the male
    • acts as a sphincter for the vagina in the female
  • Ischiocavernosus (along with bulbospongiosus)
    • helps maintain erection by compressing veins
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