Anatomy - MOINA Connecting the Upper Limb to the Vertebral Column

origin of trapezius

occipital bone, ligamentum nuchae, spine of 7th cervical vertebrae, spines of all thoracic vertebrae

insertion of trapezius

• upper fibers: lateral third of clavicle

• middle and lower fibers: acromion and spine of scapula

innervation of trapezius

• motor: spinal part of accessory nerve

• sensory: C3 and 4

action of trapezius

• upper fibers: elevate the scapula

• middle fibers: pull scapula medially

• lower fibers: pull medial border of scapula downward

origin of latissimus dorsi

iliac crest, lumbar fascia, spines of lower 6 thoracic vertebrae, lower 3 or 4 ribs, and inferior angle of scapula

insertion of latissimus dorsi

floor of bicipital groove of humerus

innervation of latissimus dorsi

thoracodorsal nerve

action of latissimus dorsi

extends, adducts, and medially rotates the arm

origin of levator scapulae

transverse processes of first 4 cervical vertebrae

insertion of levator scapulae

medial border of scapula

innervation of levator scapulae

C3 and 4 and dorsal scapular nerve

action of levator scapulae

raises medial border of scapula

origin of rhomboid minor

ligamentum nuchae and spines of 7th cervical and 1st thoracic vertebrae

insertion of rhomboid minor

medial border of scapula

innervation of rhomboid minor

dorsal scapular nerve

action of rhomboid minor

raises medial border of scapula upward and medially

origin of rhomboid major

2nd to 5th thoracic spines

insertion of rhomboid major

medial border of scapula

innervation of rhomboid major

dorsal scapular nerve

action of rhomboid major

raises medial border of scapula upward and medially