Muscles of the trunk

This tutorial covers the muscles of the trunk wall, focusing on both thoracic and abdominal regions. It details the intercostal, transversus thoracis, subcostal, scalene, and subclavius muscles, explaining their roles in respiration and stabilization. The abdominal wall muscles, including the external and internal obliques and rectus abdominis, are discussed in terms of their functions in movement and pressure maintenance. The back and posterior abdominal muscles, such as the trapezius, rhomboid, and quadratus lumborum, are explored for their roles in stabilization and movement. Finally, the intrinsic back muscles are examined for their contributions to spinal movement and support.

What are the two types of intercostal muscles and how do they function during respiration?

Describe the function of the transversus thoracis muscle during expiration.

How do the scalene muscles contribute to respiration?

What role does the pectoralis minor muscle play during inspiration?

Explain the function of the external oblique muscle in relation to trunk movement.

What is the significance of the rectus abdominis muscle in abdominal pressure?

Describe the function of the trapezius muscle in shoulder stabilization.

How do the rhomboid muscles assist in scapular movement?

What is the role of the latissimus dorsi muscle during expiration?

Explain how the intrinsic muscles of the back contribute to spinal stability.