This document summarizes several muscles that produce scapulo-thoracic movement: the trapezius, rhomboids, levator scapulae, serratus anterior, and pectoralis minor. It provides details on the origin, insertion, action, and innervation of each muscle. The trapezius stabilizes and rotates the scapula. The rhomboids and levator scapulae retract and elevate the scapula. The serratus anterior protracts and rotates the scapula. The pectoralis minor depresses and rotates the scapula.

1. Muscles that produce Scapulo-
Thoracic movement.

2. Trapezius

3. Trapezius
 Origin
 Spinous processes C1-T12, occiput, nuchal
ligament
 Insertion
 Spine of the scapula
 Action
 Stabilise the scapula, retraction, elevation and
rotation of the scapula
 Innervation
 Accessory nerve (C2-C4)

4. Trapezius

5. Rhomboids & Levator scapulae

6. Rhomboideus major and minor
 Origin
 Spinous processes C6-T4
 Insertion
 Medial border of the scapula
 Action
 Maintains the scapula on the chest wall
 Retraction of the scapula
 Innervation
 Dorsal scapular nerve (C4-C5)

7. Levator scapulae
 Origin
 Transverse processes of C1-C4
vertebrae
 Insertion
 Superior angle & medial border of
scapula
 Action
 Elevation and rotation of the scapula
 Innervation
 Dorsal scapular nerve (C4-C5)

8. Rhomboids & Levator scapulae

10. Serratus anterior
 Origin
 9 slips from ribs 1-9
 Insertion
 Medial border of the scapula
 Action
 Maintains the scapula on the chest wall
 Protraction and rotation of the scapula
 Innervation
 Long thoracic nerve (C5-C7)

11. Serratus anterior

12. Pectoralis minor

13. Pectoralis minor
 Origin
 Ribs 3-5
 Insertion
 Coracoid process of the scapula
 Action
 Depression & rotation of the scapula
 Innervation
 Medial pectoral nerves (C6-C8)

14. Pectoralis minor