Synergists - muscles working together

Scapula - scapulothoracic joint

Elevation

          Trapezius (upper)
          Rhomboid major
          Rhomboid minor
          Levator scapula

Depression 

          Trapezius (upper)
          Rhomboid major
          Rhomboid minor
          Levator scapula

Abduction (protraction)
     
          Serratus (anterior)
          Pectoralis minor

Adduction (rectraction)

          Trapezius (middle)
          Rhomboid major
          Rhomboid minor

Upward rotation

          Trapezius (uppper/lower)

Downward rotation 

          Rhomboid major
          Rhomboid minor
          Levator scapula