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The serratus anteriorProtractor / Stabilizer Along sides of ribs; moves shoulder blade forward, ‘boxer’s muscle’. muscle is a fan-shaped muscle located on the lateralAway from the midline of the body. aspect of the ribcage, beneath the scapulaTriangular “shoulder blade” on posterior thorax; connects clavicle and humerus..
Photography, text, and labels by Rob Swatski, Assistant Professor of Biology, Harrisburg Area Community College – York Campus, York, PA.
Serratus anterior Origin
The serratus anterior muscle originates from the lateral surfaces of the upper eight or nine ribsCurved bones forming the rib cage; articulate with thoracic vertebrae and most with the sternum.. The muscle fibers start from the first rib to the ninth or tenth rib. They span from the anterior to the posterior side of these ribs.
Serratus anterior Insertion
The muscle inserts onto the anterior surface of the scapula. The serratus anterior attaches to the medial borderLong edge parallel to the vertebral column (closer to spine). of the scapula. It extends from the superior angleUppermost point of the scapula; connects the superior and medial borders. to the inferior angleBottom tip of scapula where medial and lateral borders meet; visible when arm is raised..
Serratus anterior Actions
Scapular Protraction
Scapular Stabilization
Assistance in Arm Elevation
Interactive Materials
Use this 3D Viewer to Explore the Muscles of the Upper Body
“Open3DModel – Upper limb – English labels” by Open3D project, Jan Kooloos, RadboudUMC, Eungyeol Lee, LUMC et al, license: CC BY-SA
Identify More Muscles
Link to more Muscle Identification
Upper Arm Muscles
Forearm Muscles
Calf Muscles
Anterior Thigh Muscles
Posterior Thigh Muscles
Knee Structures
Chest Muscles
Back Muscles
Abdominal Muscles
Neck Muscles
Head Muscles
List of terms
- anterior
- serratus anterior
- lateral
- scapula
- anatomy
- ribs
- medial border
- superior angle
- inferior angle