Scapular abduction, often referred to as scapular protraction, is the movement of the scapula away from the spine, gliding it along the rib cage. The primary muscle responsible for this movement is the serratus anterior. This muscle originates from the upper eight or nine ribs and inserts along the medial border of the scapula. Its contraction pulls the scapula forward and around the thoracic wall, which is essential not only for abduction but also for upward rotation of the scapula during arm e

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