Serratus Anterior Muscle: Origin, Function & Detailed Anatomy | Modern Body Maps
Explore the serratus anterior muscle, its origin on the upper ribs, insertion on the scapula, and its crucial role in arm movement and shoulder stability.
The serratus anterior is a key muscle that originates from the outer surface of the first eight or nine ribs. This muscle attaches firmly to the anterior border of the scapula, commonly known as the shoulder blade. It is divided into three distinct parts: the superior, intermediate (or medial), and inferior sections. The primary role of the serratus anterior is to facilitate the forward rotation of the arm and to draw the scapula forward and around the rib cage. This lateral movement of the scapula is essential for raising the arm, enabling smooth and controlled elevation. Additionally, the serratus anterior supports the upward rotation of the scapula, which is critical for lifting objects overhead with ease and stability.
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