Anatomy of the Pelvic Region
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Questions and Answers

What is the function of the hip bones in the pelvic region?

  • Supporting the head
  • Protecting the thoracic viscera
  • Transferring weight between lower limbs and trunk (correct)
  • Providing attachment for muscles of upper limbs
  • Which ligament runs from the sacrum to the ischial spine in the pelvis?

  • Anterior sacroiliac ligament
  • Sacrospinous ligament (correct)
  • Sacrotuberous ligament
  • Posterior sacroiliac ligament
  • Which structure allows passage of structures from the lesser pelvis to the gluteal and perineum regions?

  • Lesser sciatic foramen
  • Greater sciatic foramen (correct)
  • Ischial tuberosity
  • Pubic symphysis
  • What does Relaxin do in relation to pelvic ligaments during pregnancy?

    <p>Loosens pelvic ligaments</p> Signup and view all the answers

    What is the angle of the pubic arch in males?

    <p>50° - 60°</p> Signup and view all the answers

    What differentiates the female and male bony pelvis according to sexual dimorphism?

    <p>Female pelvis has a narrow, deep lesser pelvis; male pelvis has a wide, shallow lesser pelvis</p> Signup and view all the answers

    Which nerve primarily innervates the levator ani?

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

    What is the main function of the levator ani muscle?

    <p>Supports the organs in the pelvis</p> Signup and view all the answers

    Which structure does the piriformis muscle form a thickening of?

    <p>Obturator fascia</p> Signup and view all the answers

    What defines the perineal body?

    <p>Convergence of several sphincter and perineal pouch muscles</p> Signup and view all the answers

    Which structure allows urogenital viscera to pass from the pelvic cavity to the perineum?

    <p>Urogenital hiatus</p> Signup and view all the answers

    What is the significance of relaxing the levator ani muscle?

    <p>Promotes urination and defecation</p> Signup and view all the answers

    Which artery supplies the inferior bladder, prostate, seminal vesicles, cervix, and vagina?

    <p>Middle rectal artery</p> Signup and view all the answers

    Which artery wraps around the sacrospinous ligament and supplies perineal structures?

    <p>Obturator artery</p> Signup and view all the answers

    Which division of the internal iliac artery is discussed in more detail in future lectures?

    <p>Posterior division</p> Signup and view all the answers

    Which artery passes through the obturator canal to the medial thigh?

    <p>Internal pudendal artery</p> Signup and view all the answers

    What type of nerves provide motor and general sensation to the perineum and pelvic walls?

    <p>Somatic nerves</p> Signup and view all the answers

    Which artery supplies the superior bladder?

    <p>Anterior division of the Internal Iliac Artery</p> Signup and view all the answers

    Which nerve supplies the somatic innervation of the perineum?

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

    What is the course of the pudendal nerve as it exits the pelvic cavity?

    <p>Enters the greater sciatic foramen</p> Signup and view all the answers

    Which plexus provides autonomic innervation of the pelvis?

    <p>Inferior hypogastric plexus</p> Signup and view all the answers

    Where do some fibres from the pelvic splanchnic nerves pass to supply hindgut organs?

    <p>Superior hypogastric plexus</p> Signup and view all the answers

    Which muscles are supplied by the pudendal nerve?

    <p>Muscles of anal and urogenital triangle</p> Signup and view all the answers

    What sensation is supplied by the pudendal nerve?

    <p>Sensation of external genitalia and skin of perineum</p> Signup and view all the answers

    What region of the spinal cord do visceral afferent fibers from pelvic viscera in contact with peritoneum follow?

    <p>T12-L2</p> Signup and view all the answers

    Which nerve provides retroperitoneal parasympathetic fibers in the pelvis?

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

    Which spinal cord regions do visceral afferent fibers from pelvic viscera not in contact with peritoneum follow?

    <p>S2-S4</p> Signup and view all the answers

    Where are the pelvic sub-plexuses located?

    <p>Lateral to rectum</p> Signup and view all the answers

    Which autonomic nerve innervates the lower thoracic and upper lumbar spinal cord regions?

    <p>Sacral splanchnic nerve</p> Signup and view all the answers

    What is the general rule regarding visceral afferent fibers above the pelvic pain line?

    <p>They follow sympathetics</p> Signup and view all the answers

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