muscles operating on the humerus

Question 1

pectoralis major

Answer 1

flex, adduct, and medially rotate humerus clavicle, sternum, ribs greater tubercle of humerus

Question 2

latissimus dorsi

Answer 2

extends, adducts, and medially rotate humerus t7-l5, ribs 9-12, iliac crest intertubercular sulcus of humerus

Question 3

teres major

Answer 3

extend, adduct, and medially rotate humers inferior angle of the scapula lesser tubercle

Question 4

coracobrachialis

Answer 4

flex, adduct, and medially rotate humerus coracoid process of scapula middle shaft of humerus

Question 5

supraspinatus

Answer 5

ABduct humerus supraspinous fossa greater tubercle

Question 6

infraspinatus

Answer 6

laterally rotate humerus infraspinous fossa greater tubercle

Question 7

teres minor

Answer 7

laterally rotate humerus lateral border of scapula greater tubercle

Question 8

subscapularis

Answer 8

medially rotate humerus subscapular fossa lesser tubercle

Question 9

deltoid

Answer 9

flex, abduct, and extend humerus acromion and spine of scapula, clavicle deltoid tuberosity