Anatomy of the Perineum
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Questions and Answers

Where is the perineum located?

  • Above the umbilicus
  • Behind the knee joint
  • Between the scapulae
  • Anterior to the sacrum and coccyx (correct)
  • What divides the perineum into the urogenital triangle and anal triangle?

  • Line joining the iliac crests
  • Line joining the patellae
  • Line joining the scapulae
  • Line joining the two ischial tuberosities (correct)
  • What is located at the center of the perineum?

  • Pubic symphysis
  • Mons pubis
  • Perineal body (correct)
  • Ischial tuberosity
  • Which structure forms the deep boundaries of the perineum?

    <p>Sacrotuberous ligament</p> Signup and view all the answers

    What is the characteristic appearance of the confluence of the three taeniae in the anal triangle?

    <p>Trefoil appearance</p> Signup and view all the answers

    Which region lies between levator ani and the inner aspects of the thighs?

    <p>Perineal region</p> Signup and view all the answers

    What structures are found in the anal triangle?

    <p>Anal canal and ischioanal fossa</p> Signup and view all the answers

    What is the primary function of the hemorrhoidal venous plexus?

    <p>To supply blood to internal hemorrhoids</p> Signup and view all the answers

    Where is the perineal body located?

    <p>Between the superficial and deep perineal pouches</p> Signup and view all the answers

    Which fascial layer in the perineum is continuous with Scarpa's fascia of the abdomen?

    <p>Colle’s fascia</p> Signup and view all the answers

    Why are abscesses in the perianal space considered more painful than those in the ischioanal space?

    <p>Because fat in the perianal space is more tightly loculated</p> Signup and view all the answers

    What can result from the rupture of perianal abscesses?

    <p>Formation of fistulae between skin and anal canal</p> Signup and view all the answers

    Which nerve supplies the perineum and is a branch of the sacral plexus?

    <p>Pudendal nerve</p> Signup and view all the answers

    Which spinal nerves contribute to the pudendal nerve?

    <p>S1-S3</p> Signup and view all the answers

    Where do most of the perineum lymphatics drain?

    <p>Superficial inguinal nodes</p> Signup and view all the answers

    Which structure drains into deep inguinal nodes?

    <p>Glans penis/clitoris</p> Signup and view all the answers

    Which region follows parasympathetic innervation retrograde to thoracolumbar spinal ganglia?

    <p>Uterus</p> Signup and view all the answers

    What nerve supplies the sympathetic innervation for visceral afferent pain fibers from the subperitoneal uterine cervix and vagina?

    <p>Pelvic splanchnic nerves</p> Signup and view all the answers

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