What action do the serratus anterior and pectoralis minor muscles contribute to?

The serratus anterior and pectoralis minor muscles play a significant role in scapular protraction. The serratus anterior is primarily responsible for moving the scapula forward around the thoracic wall, allowing for the protraction of the scapula. This motion is important for activities that involve reaching forward or pushing.

Additionally, the pectoralis minor assists in this movement, working in conjunction with the serratus anterior to bring the medial border of the scapula away from the spine. This combined action is critical during many upper body movements, particularly in gestures that require a forward reach or push, as well as in stabilizing the shoulder girdle.

Understanding this function is essential for physical therapy, as it helps to inform rehabilitation strategies for patients with shoulder injuries or limitations in scapular mobility.