Beginner Subcostal Muscles Quiz
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This quiz contains 10 questions. Click below to begin.
Q1. Where are the subcostal muscles located?
- Within the lungs
- External surface of the sternum
- Inside the pericardial cavity
- Internal surface of the posterior thoracic wall
Q2. Subcostal muscles are most commonly found in which part of the thorax?
- Lung apex
- Superior mediastinum
- Lower posterior thorax
- Anterior thoracic inlet
Q3. Which muscles do the subcostal muscles resemble in fiber direction?
- Rectus abdominis
- Pectoralis major
- External intercostal muscles
- Internal intercostal muscles
Q4. Which nerves innervate the subcostal muscles?
- Phrenic nerves
- Vagus nerves
- Accessory nerves
- Intercostal nerves
Q5. What is the principal action of the subcostal muscles?
- Depress the ribs
- Contract the heart
- Elevate the scapula
- Abduct the upper limb
Q6. Rib depression by the subcostal muscles can assist which respiratory phase?
- Forced expiration
- Quiet inspiration
- Phonation only
- Swallowing
Q7. Subcostal muscles belong to which anatomical wall?
- Pelvic wall
- Cranial wall
- Thoracic wall
- Orbital wall
Q8. Are subcostal muscles found mainly on the external or internal surface of the ribs?
- Internal surface
- Only within costal cartilage
- External surface
- Only within the sternum
Q9. Subcostal muscles are generally better developed in which intercostal spaces?
- Only the second intercostal space
- They are equally developed in every space
- Only the first intercostal space
- Lower intercostal spaces
Q10. Which statement best describes the general role of subcostal muscles?
- They assist rib depression
- They elevate the clavicle
- They open the heart valves
- They directly expand the lungs