Educational Content: This article is for informational purposes only and does not constitute medical advice. Always consult a healthcare provider for diagnosis and treatment.
Definition of Serratus magnus
Medically reviewed by Min Clinic Staff | Updated: January 2026
Serratus magnus: One of the serratus muscles of the back and thorax. The serratus magnus originates from the lateral aspect (the side) of the first eight to nine ribs and inserts into the medial margin of the scapula (wing bone). The serratus anterior rotates scapula and pulls it forward and elevates the ribs.