Muscles Connecting the Upper Limb to Vertebral Column

Trapezius Origin

Occipital bone, ligaments nuchae, spine of 7th cervical vertebra, spines of all thoracic vertebrae

Trapezius insertion

Upper fibers into lateral third of clavicle; middle and lower fibers into acromion and spine of scapula

Trapezius nerve supply

Spinal part of accessory nerve (motor)

C3 and C4 (sensory)

Trapezius nerve roots

XI Cranial nerve (spinal part)

Trapezius action

Upper fibers elevate the scapula; middle fibers pull the scapula medially; lower fibers pull medial border of scapula downward

Latissimus Dorsi Origin

Iliac Crest, lumbar fascia, spines of lower six thoracic vertebrae, lower three or four ribs, and inferior angle of scapula

Latissimus Dorsi insertion

Floor of bicipital groove of humerus

Latissimus Dorsi Nerve supply

Thoracodorsal nerve

Latissimus Dorsi Nerve rooots

C6-7-8

Latissimus Dorsi Action

Extends, abducts, and medially rotates the arm

Levator Scapulae Origin

Transverse processes of 1st four cervical vertebrae

Levator Scapulae, Rhomboid minor, Rhomboid major Insertion

Medial border of SCapula

Levator Scapulae Nerve supply

C3 and 4 and dorsal scapular nerve

Levator Scapulae Nerve Roots

C3-4-5

Levator Scapulae Action

Raises medial border of scapula

Rhomboid minor origin

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

Rhomboid minor and Rhomboid majar nerve supply

Dorsal Scapular nerve

Rhomboid minor and Rhomboid major nerve roots

C4-5

Rhomboid minor and Rhomboid major action

Raises medial border of scapula upward and medially

Rhomboid major origin

2nd to 5th thoracic spines