Shoulder Girdle: Origin, Insertion, Action

Trapezius (Upper Fibers) Originate?

Base of skull (Occipital Protuberance)

Trapezius (Middle Fibers) Originate:

Spinous processes of C7-T3 vertebrae

Trapezius (Lower Fibers) Originate:

Spinous processes of T4-T12 vertebrae

Trapezius (Upper Fibers) Insert:

Lateral Side of Clavicle

Trapezius (Middle Fibers) Insert:

Medial Border of the Acromion and spine of the scapula

Trapezius (Lower Fibers) Insert:

Base of the Scapular Spine

Trapezius (Upper Fibers) Action:

Elevation of Scapula and Upward Rotation of Scapula

Trapezius (Middle Fibers) Action:

Elevation, Upward Rotation and Retraction of the Scapula

Trapezius (Lower Fibers) Action:

Depression, Retraction, Upward Rotation of the Scapula

Levator Scapulae Originates:

Transverse process of C1-C4

Levator Scapulae Inserts:

Superior Angle and the top part of the Medial Border of the Scapula

Levator Scapulae Action:

Elevates the scapula, Weak downward rotation and adduction

Rhomboid Minor Originates:

Spinous Proccesses of C7 - T1

Rhomboid Major Originates:

Spinous Processes of T2 - T5

Rhomboid Minor Inserts:

Medial Border of the Scapula above the spine

Rhomboid Major Inserts:

Medial Border of the Scapula below the spine

Rhomboids (Minor and Major) Action:

Scapular Retraction, Downward rotation, Slight Elevation

Serratus Anterior Originates:

Surface Upper 9 Ribs

Serratus Anterior Inserts:

Anterior aspect of whole length of the medial border

Serratus Anterior Action:

Protraction and Upward Rotation

Pectoralis Minor Originates:

Anterior Ribs 3 - 5

Pectoralis Minor Insertion:

Coracoid Process of Scapula

Pectoralis Minor Action:

Protraction, Downward Rotation and Depression of scapula

Subclavius Originates:

Superior aspect of Rib 1

Subclavius Insertion:

Inferior Groove of Clavicle

Subclavius Action:

Stabilization and protection of the sternoclavicular joint