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Mnemonics, Simplified Concepts & Thoughts

Superficial and Deep Perineal Space or Pouch

Epomedicine, Aug 17, 2023Aug 17, 2023

Last updated on August 17, 2023

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

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

Contents:

  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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PGMEE, MRCS, USMLE, MBBS, MD/MS AnatomyGeneral SurgeryObGynReproductive system

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Epomedicine. Superficial and Deep Perineal Space or Pouch [Internet]. Epomedicine; 2023 Aug 17 [cited 2025 May 9]. Available from: https://epomedicine.com/medical-students/superficial-and-deep-perineal-space-or-pouch/.

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