Intermediate Pelvic Diaphragm Quiz
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This quiz contains 10 questions. Click below to begin.
Q1. Which three components are commonly recognized within levator ani?
- Puborectalis, pubococcygeus, and iliococcygeus
- Piriformis, coccygeus, and obturator internus
- Pubococcygeus, piriformis, and gluteus maximus
- Bulbospongiosus, ischiocavernosus, and puborectalis
Q2. Which fascial structure provides an important lateral origin for levator ani?
- Tendinous arch of levator ani
- Inguinal ligament
- Sacrotuberous ligament
- Linea alba
Q3. The tendinous arch of levator ani is a thickening of which fascia?
- Superficial perineal fascia
- Thoracolumbar fascia
- Transversalis fascia
- Obturator fascia
Q4. Which bony landmark provides attachment for both levator ani and coccygeus?
- Anterior superior iliac spine
- Ischial spine
- Ischial tuberosity
- Pubic tubercle
Q5. What is the principal functional significance of tonic contraction of puborectalis?
- Opening of the ureters
- Elevation of the sacral promontory
- Rotation of the hip
- Maintenance of the anorectal angle
Q6. What normally happens to puborectalis during defecation?
- It pulls the coccyx posteriorly
- It rotates the rectum laterally
- It contracts maximally and closes the rectum
- It relaxes and allows the anorectal angle to straighten
Q7. Which sacral levels principally contribute to the nerve to levator ani?
- S3 and S4
- L1 and L2
- T12 and L1
- L3 and L4
Q8. Which nerves primarily supply the coccygeus muscle?
- Ilioinguinal nerve
- Femoral nerve
- Branches from S4 and S5
- Obturator nerve
Q9. Which statement best describes the relationship between the pelvic diaphragm and the pelvic viscera?
- It completely seals the pelvic cavity
- It suspends the viscera from the pelvic inlet
- It supports the viscera while permitting necessary passages through the pelvic floor
- It lies entirely superior to the pelvic viscera
Q10. Which action of the pelvic diaphragm assists continence during coughing?
- Complete relaxation of levator ani
- Opening of the anal canal
- Reflex contraction that supports the pelvic outlets
- Posterior displacement of the pelvic viscera