Origin
What is the origin of the supraspinatus?
supraspinous fossa of the scapula
What is the insertion of the infraspinatus?
greater tubercle of humerus
What is the action of the upper trapezius?
scapular elevation and upward rotation
What is the nerve innervation of the levator scapula?
third and fourth cervical nerves and dorsal scapular nerve
What is the origin of the teres major?
inferior axillary border of scapula near the inferior angle
What is the origin of the pectoralis minor?
anterior surface, third through fifth ribs
What is the insertion of the middle deltoid?
deltoid tuberosity
What is the action of the serratus anterior?
scapular protraction and upward rotation
What is the nerve innervation of the anterior deltoid?
axillary nerve
What is the action of the coracobrachialis?
stabilizes the shoulder joint
What is the origin of the lower trapezius?
spinous processes of middle and lower thoracic vertebrae
What is the insertion of the middle trapezius?
scapular spine
What is the action of the subscapularis?
shoulder medial rotation
What is the nerve innervation of the teres major?
lower subscapular nerve
What is the insertion of the pectoralis minor?
What is the origin of the pectoralis major (clavicular portion)?
medial third of clavicle
What is the insertion of the rhomboids?
vertebral border of scapula between the spine and inferior angle
What is the nerve innervation of the teres minor?
axillary nerve
What is the nerve innervation of the pectoralis major?
lateral and medial pectoral nerves
What is the origin of the latissimus dorsi?
spinous processes of T7 through L5 (via thoracolumbar fascia), posterior surface of sacrum, iliac crest, and lower 3 ribs
What is the insertion of the pectoralis major (sternal portion)?
lateral lip of bicipital groove of humerus (superior to the clavicular portion)
What is the action of the posterior deltoid?
shoulder abduction, extension, hyperextension, lateral rotation, horizontal abduction
What is the nerve innervation of the coracobrachialis?
musculocutaneous nerve
What is the nerve innervation of the serratus anterior?
long thoracic nerve