A patient has a traumatic injury of sternocleidomastoid muscle. This has resulted in a decrease in the following value:

Answer options

1. Functional residual lung capacity
2. Expiratory reserve volume
3. Residual volume
4. Respiratory volume
5. Inspiratory reserve volume

Explanation

A patient has a traumatic injury of the sternocleidomastoid muscle. This has resulted in a decrease in the following value:The sternocleidomastoid muscle (along with the scalene muscle), is an accessory muscle for breathing. It increases IRV. So, any injury will decrease IRV.