What term describes the muscles involved in respiration aside from the primary muscles?

The term that describes the muscles involved in respiration aside from the primary muscles is the accessory muscles. During normal, relaxed breathing, the primary muscles utilized are the diaphragm and the intercostal muscles, which work together to expand and contract the chest cavity. However, in situations where more forceful or labored breathing is required—such as during exercise or respiratory distress—other muscles become important in assisting with these actions.

Accessory muscles include muscles such as the sternocleidomastoid, scalene muscles, and pectoralis major, among others. These muscles help elevate the rib cage and expand the thoracic cavity further, facilitating greater airflow. Understanding the role of these accessory muscles is crucial for EMTs as it helps assess a patient’s respiratory effort and the severity of their condition.