Intermediate Innermost Intercostal Muscles Quiz

Q1. Between which layers does the main intercostal neurovascular bundle run?

• External and internal intercostals
• Parietal and visceral pleura
• External intercostals and skin
• Internal and innermost intercostals

Q2. Which structures form the main intercostal neurovascular bundle?

• Vein, tendon, and ligament
• Nerve, lymph node, and bronchus
• Artery, bronchus, and vein
• Vein, artery, and nerve

Q3. What is the usual superior to inferior arrangement of the main intercostal neurovascular bundle?

• Nerve, vein, artery
• Vein, artery, nerve
• Nerve, artery, vein
• Artery, vein, nerve

Q4. Where does the main intercostal neurovascular bundle usually course?

• Superior border of the rib above
• Pleural cavity
• Costal groove of the rib above
• Center of the intervertebral disc

Q5. How do innermost intercostal fibers generally run?

• Directly vertically
• Horizontally
• Inferoanteriorly
• Inferoposteriorly

Q6. Which muscles are considered part of the deepest intercostal muscle plane together with the innermost intercostals?

• Subcostals and transversus thoracis
• Pectoralis major and minor
• Scalenes and sternocleidomastoid
• Trapezius and latissimus dorsi

Q7. Which structure lies deep to the innermost intercostal muscles?

• Pectoralis major
• External intercostal muscle
• Superficial fascia
• Endothoracic fascia

Q8. Which serous membrane lies deep to the endothoracic fascia?

• Fibrous pericardium
• Peritoneum
• Parietal pleura
• Visceral pleura

Q9. Which action do innermost intercostals share with the interosseous part of the internal intercostals?

• Depression of the ribs
• Extension of the vertebral column
• Abduction of the upper limb
• Elevation of the scapula

Q10. Why is the innermost intercostal layer anatomically important during thoracic procedures?

• It contains the pulmonary arteries
• It contains the thoracic duct
• It lies deep to the main intercostal neurovascular bundle
• It forms the fibrous pericardium