Pectoralis Minor
O = Anterior surface of the 3rd and 5th ribs
I = Coracoid process of the scapula
A = Scapular depression, protraction, downward rotation and tilt
Retraction
Middle trapezius and rhomboids
Protraction
Serratus anterior and pectoralis minor
Upward Rotation
Upper trapezius, lower trapezius and serratus anterior
Lower Trapezius
O = Spinous processes of middle and lower thoracic vertebrae
I = Base of scapular spine
A = Scapular depression and upward rotation
Serratus Anterior
O = Lateral surface of the upper six ribs
I = Vertebral border of the scapula; anterior surface
A = Scapular protraction and upward rotation
Upper Trapezius
O = Occipital bone and spinous processes of upper cervical vertebrae
I = Outer 3rd of clavicle and acromion process
A = Scapular elevation and upward rotation
Rhomboids
O = Spinous processes of C7-T5
I = Vertebral border of scapula between superior and inferior angles
A = Scapular retraction, elevation and downward rotation
Downward Rotation
Rhomboids, pectoralis minor and levator scapula
Depression
Lower trapezius and pectoralis minor
Levator Scapula
O = Transverse process of first four cervical vertebrae
I = Vertebral border of scapula between superior angle and spine
A = Scapular elevation and downward rotation
Elevation
Upper trapezius, rhomboids and levator scapula
Middle Trapezius
O = Spinous processes of C7-T3
I = Scapular spine
A = Scapular retraction