What is a physical sign of the increased use of accessory muscles for expiration in someone with emphysema?

Question

What is a physical sign of the increased use of accessory muscles for expiration in someone with emphysema?​

Quizplus · Accepted Answer

"Barrel chest" is a physical sign of increased use of accessory muscles for expiration in someone with emphysema. The chest appears rounded and bulging, similar to the shape of a barrel. This is due to the loss of elastic recoil in the lungs and increased air trapping, causing the chest to be held in a more expanded position.

What Is a Physical Sign of the Increased Use of Accessory