Intermediate External Oblique Quiz

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

• Serratus anterior
• Transversus thoracis
• Subclavius
• Pectoralis minor

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

• Trapezius
• Multifidus
• Latissimus dorsi
• Levator scapulae

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Q10. How does external oblique contribute to forced expiration?

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