| Term | Definition |
|
Rhomboideus |
Origin - Upper thoracic vertebrae. Insertion - Medial border of scapula. Action - Draws scapula dorsally. |
|
Rhomboideus capitis |
Origin - Lambdoidal ridge of skull. Insertion - Angle of scapula. Action - Draws scapula crainally |
|
Splenius |
Origin - Mid-dorsal fascial line. Insertion - Lambdoidal ridge. Action - Turns and elevates head. |
|
Supraspinatus |
Origin - Supraspinous fossa. Insertion - Greater tubercle of humerus. Action - Extends arm. |
|
Infraspinatus |
Origin - Infraspinous fossa. Insertion - Greater tubercle of humerus. Action - Rotates arm outward. |
|
Teres major |
Origin- Axillary border of scapula. Insertion - Medial surface of humerus. Action - Flexes and rotates humerus. |
|
Teres minor |
Origin - Lateral border of scapula. Insertion - Greater tubercle of humerus. Action - Rotates humerus. |
|
Subscapularis |
Origin - Subscapular fossa. Insertion - Lesser tubercle of humerus. Action - Draws humerus medially. |