humerus

Question 1

pectoralis major origin, insertion and 3 actions

Answer 1

origin: clavicle, sternum, ribs
insertion: humerus: intertubercular sulcus
action 1: flex humerus
action 2: adduct humerus
action 3: medially rotate humerus

Question 2

latissimus dorsi origin, insertion and 3 actions

Answer 2

origin: vertebrae, ribs, ilium
insertion: humerus: intertubercular sulcus
action 1: extend humerus
action 2: adduct humerus
action 3: medially rotate humerus

Question 3

teres major orgin, insertion and 2 actions

Answer 3

origin: scapula: inferior angle
insertion: humerus: intertubercular sulcus
action 1: extend humerus
action 2: medially rotate humerus

Question 4

coracobrachialis origin, insertion and 2 actions

Answer 4

origin: scapula: coracoid process
insertion: humerus: shaft
action 1: flex humerus
action 2: medially rotate humerus

Question 5

supraspinatus origin, insertion and 1 action

Answer 5

origin: scapula: supraspinous fossa
insertion: humerus: greater tubercle
action 1: abduct humerus

Question 6

infraspinatus origin, insertion and 1 action

Answer 6

origin: scapula: infraspinous fossa
insertion: humerus: greater tubercle
action 1: laterally rotate humerus

Question 7

teres minor origin, insertion and 1 action

Answer 7

origin: scapula: lateral border
humerus: greater tubercle
action 1: laterally rotate humerus

Question 8

subscapularis origin, insertion, and 1 action

Answer 8

origin: scapula: subscapular fossa
insertion: humerus: lesser tubercle
action 1: medially rotate humerus

Question 9

deltoid origin, insertion, and 3 actions

Answer 9

origin: acromion and spine of scapula, clavicle
insertion: deltoid tuberosity of humerus
Anterior head action: flex humerus
lateral head action: abduct humerus
posterior head action: extend humerus