Serratus Anterior

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Other Names Serratus Magnus Boxer's Muscle Heads Digitations Superior Inferior (Longer) Movement Scapula Abduction [1, 2] Upward Rotation [2] Elevation (Weak) [1] Attachments Origin Ribs (Surface) [1, 2] Upper 8 or 9 Insertion Scapula (Medial) [1, 2] Medial Border Anterior Surface Related Muscles Pectoralis Minor Rhomboids

Comments The serratus anterior holds scapula against thoracic wall. A winged scapula condition indicates weakness of serratus anterior. They also help stabilize scapula during shoulder internal and external rotation when shoulder is 90° abduction (Ekstom RA, et al. 2003; Myers JB, et al. 2005)