Serratus Anterior
The Serratus anterior muscle is used in activities which draw the scapula forwards. It is used strongly in push-ups and bench presses. Winged scapula are an indicator of having a weak Serratus anterior.
Origin
- Upper nine ribs at the side of the chest
Insertion
- Costal aspect (side articulating with the ribs) of the medial border of the scapula
Actions
- Scapula protraction
- Rotation of the scapula upwards
Innervation
- Long thoracic nerve
Daily uses
- Reaching up to open a high window
Example strengthening exercises
- Push-ups using a resistance band
Related injuries
- Winged scapula
- Postural kyphosis
