pectoralis major

Question 1

pectoralis major origin clavicular head

Answer 1

medial half, anterior border of clavicle

Question 2

pectoralis major origin sternal head

Answer 2

anterior surface of sternum, upper 6 costal cartilages and 6th rib

Question 3

pectoralis major insertion

Answer 3

via laminated tendon into lateral lip of intertubecular groove

Question 4

pectoralis major nerve supply

Answer 4

medial pectoral C8-T1, lateral pectoral C5, 6, 7

Question 5

pectoralis major actions

Answer 5

flexes, medially rotates and adducts the arm at the shoulder

Question 6

pectoralis major function

Answer 6

pushing, punching and throwing movements