Rotator Cuff Muscles and Others that Move the Arm

Question 1

Supraspinatus origin

Answer 1

supraspinous fossa

Question 2

Supraspinatus insertion

Answer 2

greater tubercle of humerus

Question 3

Supraspinatus nerve

Answer 3

suprascapular

Question 4

Supraspinatus action

Answer 4

abducts arm (reach to back of head)

Question 5

Infraspinatus origin

Answer 5

infraspinous fossa

Question 6

Infraspinatus insertion

Answer 6

greater tubercle of humerus

Question 7

Infraspinatus nerve

Answer 7

suprascapular

Question 8

Infraspinatus action

Answer 8

extends and laterally rotates arm

Question 9

Teres minor origin

Answer 9

middle 1/3 of lateral border of scapula

Question 10

Teres minor insertion

Answer 10

greater tubercle of humerus

Question 11

Teres minor nerve

Answer 11

axillary

Question 12

Teres minor action

Answer 12

adducts and extends and laterally rotates arm

Question 13

Subscapularis origin

Answer 13

subscapular fossa

Question 14

Subscapularis insertion

Answer 14

lesser tubercle of humerus

Question 15

Subscapularis nerve

Answer 15

subscapular (upper and lower)

Question 16

Subscapularis action

Answer 16

rotates arm medially (toward belly)

Question 17

Latissimus dorsi origin

Answer 17

spinous process of T7-12, L1-5, median ridge of sacrum and iliac crest (overlaps with trapezius T7-12; trapezius is superficial; occasionally originates at inferior scapula)

Question 18

Latissimus dorsi insertion

Answer 18

crest of lesser tubercle of humerus

Question 19

Latissimus dorsi nerve

Answer 19

thoracodorsal

Question 20

Latissimus dorsi action

Answer 20

adduct, extend, medially rotate arm

Question 21

Teres major origin

Answer 21

inferior 1/3 of lateral border of scapula

Question 22

Teres major insertion

Answer 22

crest of lesser tubercle humerus

Question 23

Teres major nerve

Answer 23

lower subscapular

Question 24

Teres major action

Answer 24

adducts, extends, medially rotates arm

Question 25

Deltoid origin

Answer 25

lateral clavicle, acromion process, spine of scapula

Question 26

Deltoid insertion

Answer 26

deltoid tuberosity

Question 27

Deltoid nerve

Answer 27

axillary

Question 28

Deltoid action

Answer 28

abduct, flex, extend, and rotate arm

Question 29

Coracobrachialis origin

Answer 29

coracoid process

Question 30

Coracobrachialis insertion

Answer 30

mid medial border of humerus

Question 31

Coracobrachialis nerve

Answer 31

musculocutaneous

Question 32

Coracobrachialis action

Answer 32

adducts and flexes arm