Intermediate Pelvic Muscles Quiz
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This quiz contains 10 questions. Click below to begin.
Q1. Which structure provides a major line of origin for portions of levator ani?
- Linea alba
- Sacrotuberous ligament
- Inguinal ligament
- Tendinous arch of levator ani
Q2. The tendinous arch of levator ani is formed by a thickening of which fascia?
- Transversalis fascia
- Obturator fascia
- Superficial perineal fascia
- Thoracolumbar fascia
Q3. Which component of levator ani arises substantially from the tendinous arch and ischial spine?
- Obturator internus
- Iliococcygeus
- Puborectalis
- Piriformis
Q4. Which nerve primarily supplies obturator internus?
- Ilioinguinal nerve
- Obturator nerve
- Nerve to obturator internus
- Femoral nerve
Q5. Which nerve supplies piriformis?
- Obturator nerve
- Nerve to piriformis
- Pudendal nerve
- Femoral nerve
Q6. What is a primary action of obturator internus at the hip?
- Medial rotation of the extended thigh
- Lateral rotation of the extended thigh
- Dorsiflexion of the ankle
- Extension of the knee
Q7. What is a major action of piriformis when the hip is extended?
- Extension of the knee
- Medial rotation of the thigh
- Flexion of the ankle
- Lateral rotation of the thigh
Q8. Which muscle attaches from the ischial spine and sacrospinous ligament to the lateral margins of the lower sacrum and coccyx?
- Piriformis
- Coccygeus
- Puborectalis
- Obturator internus
Q9. Which sacral levels principally contribute to the nerve to levator ani?
- T11 and T12
- L3 and L4
- L1 and L2
- S3 and S4
Q10. What happens to puborectalis during normal defecation?
- It contracts maximally to sharpen the anorectal angle
- It closes the ureters
- It laterally rotates the rectum
- It relaxes and allows the anorectal angle to straighten