Massage & Bodywork Licensing Practice Examination (MBLEx)

The serratus anterior and pectoralis minor are crucial muscles for the movement of the scapula, particularly in the action of protraction. Protraction refers to the movement of the scapula away from the spine, effectively moving it forward along the rib cage.

The serratus anterior is primarily responsible for this action; it originates from the surface of the upper eight or nine ribs and inserts on the medial border of the scapula. When it contracts, it pulls the scapula forward and around the rib cage, which is key in activities that involve reaching or pushing movements.

The pectoralis minor also contributes to scapular protraction. Although its primary functions include depression and stabilization of the scapula, it assists the serratus anterior by pulling the scapula forward as its tendons attach to the coracoid process of the scapula.

Together, these muscles facilitate important functional movements, especially in exercises and activities that involve pushing or extending the arms, highlighting their role in the protraction of the scapula.