In the frontal plane if the left chest is not deflated?

• A. If the air in the left chest is not fully deflated, then any attempted to sidebend the thorax to the left will actually result in right thoracic abduction because the unexhaled air will push the thorax over to the right.
• B. If the left chest is not deflated, left thoracic abduction occurs.
• C. There will be no effect on thoracic movement.
• D. Both sides will deflate equally.

Answer: (A)