Intermediate External Oblique Quiz

Q1. With which thoracic muscle do the superior digitations of external oblique interdigitate?

• Pectoralis minor
• Subclavius
• Serratus anterior
• Transversus thoracis

Q2. With which posterior muscle do some lower external oblique digitations interdigitate?

• Multifidus
• Levator scapulae
• Trapezius
• Latissimus dorsi

Q3. Where does the external oblique attach inferiorly to the iliac crest?

• Posterior surface of the sacrum only
• Ischial spine
• Anterior half of the outer lip of the iliac crest
• Lesser trochanter

Q4. What does the external oblique aponeurosis contribute to anterior to rectus abdominis?

• Anterior wall of the rectus sheath
• Parietal peritoneum
• Posterior wall only below the arcuate line
• Transversalis fascia

Q5. Which two attachments define the course of the inguinal ligament?

• Umbilicus and ASIS
• Pubic symphysis and ischial spine
• Xiphoid process and pubic crest
• Anterior superior iliac spine and pubic tubercle

Q6. Which structure is derived from the external oblique aponeurosis as the spermatic cord exits the superficial ring?

• Cremasteric fascia
• External spermatic fascia
• Tunica vaginalis
• Internal spermatic fascia

Q7. Which fibers reinforce the superficial inguinal ring by spanning between its crura?

• Arcuate fibers of the diaphragm
• Tendinous intersections
• Intercrural fibers
• Pampiniform fibers

Q8. Which crus of the superficial inguinal ring attaches to the pubic tubercle?

• Posterior crus
• Medial crus
• Superior crus
• Lateral crus

Q9. How does the right external oblique cooperate with the left internal oblique?

• They extend the knee
• They abduct the left arm
• They rotate the trunk to the left
• They rotate the trunk to the right

Q10. How does external oblique contribute to forced expiration?

• By pulling the diaphragm inferiorly
• By expanding the lungs directly
• By compressing abdominal contents and increasing intra-abdominal pressure
• By opening the vocal folds