9 Questions
Which movement of the sternum is primarily caused by the elevation of the ribs?
Anterior-posterior movement
Which movement of the ribs raises the middle (lateral-most parts) of the ribs?
Bucket-handle movement
Which dimension of the thorax increases slightly when the intercostal muscles contract?
Transverse dimension
Which direction does the thoracic cage move due to the combination of all these movements?
Anteriorly, superiorly, and laterally
During passive expiration, which of the following muscles relaxes?
Diaphragm and intercostal muscles
What causes the vertical dimension of the central part of the thoracic cavity to increase during inspiration?
Contraction of the diaphragm
Which dimension of the thorax increases considerably when the intercostal muscles contract?
Anteroposterior dimension
What happens to the domes of the diaphragm during expiration?
They ascend
Which muscles cause the pump-handle movement of the ribs during inspiration?
Intercostal muscles
Test your knowledge on the movements of the thoracic wall and diaphragm during respiration with this quiz. Learn about the changes in intrathoracic volume and diameters of the thorax that lead to the alternation of air intake and expulsion from the lungs.
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