Muscle Anatomy - Scapula Related Muscles

Muscle Anatomy Notes

Levator Scapulae

• Origin: Transverse processes of C1-C4

• Insertion: Superior angle of scapula

• Action:

  • Elevates, retracts, and rotates scapula

  • Laterally flexes the neck

Pectoralis Minor

• Origin: Third to fifth ribs

• Insertion: Coracoid process of scapula

• Action:

  • Depresses scapula

  • Elevates ribs

Rhomboideus Major

• Origin: Spinous processes of T1-T4

• Insertion: Medial border of scapula

• Action:

  • Retracts, rotates, and fixes scapula

Rhomboideus Minor

• Origin: Spinous processes of C6-C7

• Insertion: Medial border of scapula

• Action:

  • Retracts, slightly elevates, rotates, and fixes scapula

Serratus Anterior

• Origin: First to eighth or ninth ribs

• Insertion: Medial border of scapula

• Action:

  • Rotates and protracts scapula

  • Elevates ribs

Subclavius

• Origin: First rib

• Insertion: Clavicle

• Action:

  • Fixes clavicle or elevates first rib

Trapezius

• Origin: External occipital protuberance, ligamentum nuchae, and spinous processes of C7-T12

• Insertion: Clavicle, acromion process, and scapular spine

• Action:

  • Elevates, depresses, retracts, rotates, and fixes scapula

  • Extends neck