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Rhomboids

 


- Rhomboid Major:
    origin: spinous process of 2nd to 5th thoracic vertebrae;
    insertion: medial border of scapula from spine to inferior angle;
    action: adducts scapula and elevation of medial border; the inferior fibers aid in rotating the glenoid cavity inferior;
    nerve supply: dorsal scapular (C4, C5);
    synergists: upper, middle, and lower trapezius, levator scapula, latissimus dorsi, rhomboid minor;

- Rhomboid Minor:
    origin: ligamentum nuchae, spinous process of C7 and T1;
    insertion: medial border of scapula at the root of the spine of scapula;
    action: adducts and aids elevation of scapula;
    nerve supply: dorsal scapula, C4, C5;
    synergists: upper, middle, and lower trapezius, levator scapula, latissimus dorsi and rhomboid major