Trapezius 

O-external occepital probruerance medial portion superior nuchal line of occput ligamentum nuchaeand spinous processes C7 to T12

I-Lareral 1/3 of clavicle acronym and spine of scapula 

A-Upper fibers elevate and upwardly rotate scap

middle fibers-adduct scapula and stabilize

Lower fibers-Depress scap upwardly rotate scapula

O-spines of T7- T12

I-intertuburcular sulcus of humerus

A-extends and medially rotates arm

Rhomboids

O-Major spinous processes T2-T5

I-Medial border of scapula inferior to spine

A-Retracts and elevates the medial border of scapula while it downwardly rotates the lateral angle

Pectoralis Minor

O-Anterior surfaces of the sternal ends of ribs 3-5

I-Coracoid process of scapula

A-Draws scapula forward and downward 

O-Inferior angle of scapula

I- medial humerus

A-extends arm

O-Infraspinous fossa of scapula

I-Proximal humerus

A-Laterally rotates arm

O-Transverse processes of the C1-C4

I-Medial border of scapula between spine and superior angle

A-Elevates medial border of scapula while downwardly rotating lateral angle

-Helps trapezius and rhomboid muscles pull scapula upward and medially 

-bends neck laterally 

O-Supraspinous fossa of scapula

I-Proximal humerus

A-medially rotates arm

O-Subscapular fossa go scapula

I-Lesser tubercle of humerus

A-Medially rotates arm at shoulder