The Pectoralis Minor and the Sternocleidomastoid Muscles are Used During

Question

The pectoralis minor and the sternocleidomastoid muscles are used during forced expiration.

Accepted Answer

The pectoralis minor assists with inspiration by elevating the ribs, while the sternocleidomastoid also assists with inspiration by elevating the sternum. Forced expiration primarily involves the abdominal muscles and the internal intercostal muscles.