Pelvic Anatomy 3 Flashcards

Describe how the pelvic diaphragm differs from the urogenital diaphragm.

1
Q

What is the pelvic diaphragm?

A

The muscular pelvic floor (body wall) closing off the pelvic outlet.

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2
Q

What is the urogenital diaphragm?

A

Mainly fascial, closing off the UG triangle to give extra support anteriorly.

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3
Q

What is the perineal body.

A
  • Central tendong of the perineum
  • Both pelvic and urogenital diaphragms attach here
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4
Q

What muscles make up the pelvic diaphragm?

A
  • Levator ani
    • Pubococcygeus
    • Iliococcygeus
  • Ischiococcygeus
  • Pubococcygeal “slings”:
    • pubovaginalis
    • levator prostatae
    • puborectalis
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5
Q

What are the attachments of the pelvic diaphragm?

A
  • Central tendon
  • Anococcygeal raphe
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6
Q

What is the physiological function of the pelvic diaphragm? What happens when it weakens?

A
  • Continence and support
  • Prolapse results with weakening of the pubococcygeus, the strongest muscle
    • uterus or other organs through vagina
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7
Q

What is the innervation of the pelvic diaphragm?

A
  • Pudendal nerve from below
  • Direct branches from S3,4 above
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