ORIGIN:
spinous processes of C7 & T1.INSERTION:
medial border of the scapula.ACTION:
Rhomboid minor and Rhomboid major are working together as a whole to perform the movement.
- retract scapula (squaring shoulders), synergist with middle fibers of Trapezius.
- rotate glenoid cavity downward (lowering arm against resistance).
- stabilize scapula.