Superficial and Deep Perineal Space or Pouch

Superficial and deep perineal space is located in the urogenital triangle, the boundaries of which are:

  • Apex: Pubic symphysis
  • Two sides: Ischiopubic ramus
  • Base: A line connecting 2 ischial tuberosity

Analogy: Remember a big mac. It has 3 layers of BUN and 2 hamburger PATTIES.

Perineal space big mac analogy
  • BUN = Fascia
    • Bottom bun = Superifical perineal fascia (Colle’s fascia – continuous with Scarpa’s fascia)
    • Middle bun = Inferior fascia of urogenital diaphragm (perineal membrane – anchoring point for erectile tissues)
    • Top bun = Superior fascia of urogenital diaphragm
  • PATTIES = Space
    • Between Bottom bun and Middle bun (bottom PATTY) = Superficial perineal space
    • Between Middle bun and Top bun (top PATTY) = Deep perineal space

Posteriorly, all 3 Fascias are attached to the perineal body, closing the spaces.

Superficial Perineal Space

1. Superficial to Perineal membrane
2. Sexually Pleasurable Structures
3. 4 arteries/nerves, 3 muscles, 2 erectile tissues, 1 gland/duct


  1. 3 muscles:
    • Ischiocavernosus
    • Bulbospongiosus
    • Superficial transverse perineal muscles (2)
  2. 2 erectile tissues:
    • Crus of penis or clitoris (deep to ischiocavernosus)
    • Bulb of penis or vestibule (just under bulbospongiosus)
  3. 1 gland/duct:
    • Greater vestibular glands (Bartholin’s glands) in females
    • Duct of bulbourethral glands in males
  4. Arteries and nerves: “Perineal and Posterior
    • Perineal artery (internal pudendal artery branch)
    • Posterior scrotal/labial artery (from perineal branch)
    • Posterior scrotal/labial nerve (from perineal branch of pudendal nerve)
    • Perineal branch of posterior cutaneous nerve of thigh

Deep Perineal Space

2 muscles:

  1. Deep transverse perineal muscles
  2. External urethral sphincter

1 gland:

  • Bulbourethral glands in males

Arteries and nerves:Deep and Dorsal

  • Deep and Dorsal artery of penis/clitoris
  • Artery of bulb of penis/vestibule
  • Urethral artery (internal pudendal artery branch)
  • Dorsal nerve of penis/clitoris (branch of pudendal nerve)

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