Shoulder Girdle Muscles May 6, 2014 by Exercise Coach Trapezius (Upper Division) Trapezius (Middle Division) Trapezius ( Lower Division) Levator scapulae Rhomboid Major Rhomboid Minor Serratus Anterior Pectoralis minor Subclavius Related Posts:Middle TrapeziusLower TrapeziusUpper TrapeziusTrapezius | Origin, Insertion & Action