muscles (origin/insertion/function)

Question 1

supraspinatus

Answer 1

ROTATOR CUFF
origin: supraspinous fossa
insertion: greater tubercle 
primary function: stabilize humerus head
secondary function: abducts, laterally rotates

Question 2

infraspinatus

Answer 2

ROTATOR CUFF
origin: infraspinous fossa
insertion: greater tubercle
primary function: stabilize humerus head
secondary function: laterally rotates

Question 3

teres minor

Answer 3

ROTATOR CUFF
orgin: lateral border
insertion: greater tubercle
primary function: stabilize humerus head
secondary function: abducts, laterally rotates

Question 4

subscapularis

Answer 4

ROTATOR CUFF
origin: sub scapular fossa
insertion: lesser tubercle
primary function: stabilize humerus head
secondary function: medially rotates

Question 5

pectoralis major

Answer 5

SHOULDER MUSCLES
origin: upper is clavicle, lower is sternum + costal cartilage
insertion: lateral lip of bicipital groove
primary function: arm adduction, flexion, internal rotation

Question 6

latissimus dorsi

Answer 6

SHOULDER MUSCLES

origin: lumber + lower half of thoracic spine, inner iliac crest + sacrum
insertion: bicipital groove
function: arm adduction, extension, internal rotation

Question 7

deltoid

Answer 7

MOVES HUMERUS (AB duction)
origin: 
-anterior is clavicle
-lateral is acromion head, 
-posterior is lateral scapular spin border 
insertion: deltoid tuberosity
function:
-AH: flexes, medially rotates
-LH: abducts
-PH: extends, laterally rotates

Question 8

coraco-brachialis

Answer 8

MOVES HUMERUS (AB duction)

origin: coracoid process
insertion: humerus shaft
function: arm flexion, adduction

Question 9

teres major

Answer 9

MOVES HUMERUS (AB duction)

origin: lateral border
insertion: bicipital groove
function: medially rotates, arm extension, abduction