Intermediate Internal Intercostal Muscles Quiz

Q1. From which border of a rib do internal intercostal fibers descend?

• Inferior border of the rib above
• Medial border of the sternum
• Superior border of the rib above
• Lateral border of the scapula

Q2. Where do internal intercostal fibers attach on the rib below?

• Inferior border
• Superior border
• Tubercle only
• Head only

Q3. How far anteriorly do internal intercostal muscles extend?

• Only to the rib angle
• Only to the midaxillary line
• To the sternum
• Only to the costochondral junction

Q4. How far posteriorly does internal intercostal muscle tissue extend?

• Into the vertebral canal
• To the rib angles
• To the spinous processes
• Only to the midclavicular line

Q5. What replaces the internal intercostal muscles posteriorly?

• Endothoracic fascia
• Internal intercostal membrane
• Parietal pleura
• External intercostal membrane

Q6. Between which layers does the main intercostal neurovascular bundle run?

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

Q7. What is the usual superior to inferior order of the main intercostal neurovascular bundle?

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

Q8. Where does the main intercostal neurovascular bundle usually travel?

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

Q9. How does internal intercostal fiber direction compare with external intercostal fibers?

• They run in exactly the same direction
• They run in generally opposite directions
• Internal fibers are purely horizontal
• Internal fibers are purely vertical

Q10. Which action distinguishes the interchondral part from the interosseous part?

• The interchondral part closes the glottis
• The interchondral part depresses the scapula
• The interchondral part contracts the diaphragm
• The interchondral part can elevate the ribs