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

Answer options

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