back muscles oian Flashcards
Trapezius ORIGIN
Skull - External occipital protuberance, Fascia - ligamentum nuchae, Vertebrae - spines of C7, T1-12
Trapezius INSERTION
Clavicle - lateral 1/3, acromion and spine of scapula
Trapezius ACTION
Both elevates (upper fibers) and depresses (lower fibers) shoulder; retracts scapula; also extends head
Trapezius NERVE
Accessory n. (Cranial nerve XI)
Latissimus dorsi ORIGIN
Vertebrae - spines of T6-T12 , Fascia - thoracolumbar fascia, Pelvic bone - iliac crest
Latissimus dorsi INSERTION
Humerus - Intertubercular (bicipital) groove
Latissimus dorsi ACTION
Adducts, extends, and medially rotates arm
Latissimus dorsi NERVE
Thoracodorsal n.
Levator scapulae ORIGIN
Vertebrae - transverse processes of C1-C4
Levator scapulae INSERTION
Scapula - superior angle and medial border
Levator scapulae ACTION
Elevates and adducts scapula
Levator scapulae NERVE
Dorsal scapular n.
Rhomboid minor ORIGIN
Vertebrae - spines of C7, T1
Rhomboid minor INSERTION
Scapula - Medial border
Rhomboid minor ACTION
Elevates and adducts scapula
Rhomboid minor NERVE
Dorsal scapular n.
Rhomboid major ORIGIN
Vertebrae - spines of T2-T5