MOINA of Shoulder and Arm

Question 1

origin of pectoralis major

Answer 1

clavicle, sternum, upper six costal cartilages

Question 2

insertion of pectoralis major

Answer 2

lateral lip of bicipital groove of humerus

Question 3

nerve of pectoralis major

Answer 3

medial and lateral pectoral nerves from brachial plexus

Question 4

action of pectoralis major

Answer 4

adducts the arm and roatates it medially; clavicular fibers also flex arm

Question 5

origin of pectoralis minor

Answer 5

third, fourth, and fifth ribs

Question 6

insertion of pectoralis minor

Answer 6

coracoid process of scapula

Question 7

nerve of pectoralis minor

Answer 7

medial pectoral nerve from brachial plexus

Question 8

action of pectoralis minor

Answer 8

depresses point of shoulder; if the scapula is fixed, it elevates the ribs of origin

Question 9

origin of subclavius

Answer 9

first costal cartilage

Question 10

insertion of subclavius

Answer 10

clavicle

Question 11

nerve of subclavius

Answer 11

nerve to subclavius from upper trunk of brachial plexus

Question 12

action of subclavius

Answer 12

depresses clavicle and steadies this bone during movements of the shoulder girdle

Question 13

origin of serratus anterior

Answer 13

upper eight ribs

Question 14

insertion of serratus anterior

Answer 14

medial border and inferior angle of scapula

Question 15

nerve of serratus anterior

Answer 15

long thoracic nerve

Question 16

action of serratus anterior

Answer 16

draws the scapula forward around the thoracic wall; rotates scapula

Question 17

origin of trapezius

Answer 17

occipital bone, ligamentum nuchae, spines of seventh cervical vertebra, spines of all thoracic vertebrae

Question 18

insertion of trapezius

Answer 18

upper fibers into lateral third of clavicle, middle and lower fibers into acromion and spine of scapula

Question 19

nerve of trapezius

Answer 19

spinal part of accessory nerve (motor) and c3 and 4 (sensory)

Question 20

action of trapezius

Answer 20

upper fibers elevate the scapula; middle fibers pull scapula medially; lower fibers pull medial border of scapula downward

Question 21

origin of latissimus dorsi

Answer 21

illiac crest, lumbar fascia, spines of lower six thoracic vertebrae, lower three or four ribs, and inferior angle of scapula

Question 22

insertion of latissimus dorsi

Answer 22

floor of bicipital groove of humerus

Question 23

nerve of latissimus dorsi

Answer 23

thoracodorsal nerve

Question 24

action of latissimus dorsi

Answer 24

extends, adducts, and medially rotates the arm

Question 25

origin of levator scapulae

Answer 25

transverse processes of first four cervical vertebrae

Question 26

insertion of levator scapulae

Answer 26

medial border of scapula

Question 27

nerve of levator scapulae

Answer 27

c3 and 4 and dorsal scapular nerve

Question 28

action of levator scapulae

Answer 28

raises medial border of scapula

Question 29

origin of rhomboid minor

Answer 29

ligamentum nuchae and spines of seventh cervical and first thoracic vertebrae

Question 30

insertion of rhomboid minor

Answer 30

medial border of scapula

Question 31

nerve of rhomboid minor

Answer 31

dorsal scapular nerve

Question 32

action of rhomboid minor

Answer 32

raises medial border of scapula upward and medially

Question 33

origin of rhomboid major

Answer 33

second to fifth thoracic spines

Question 34

insertion of rhomboid major

Answer 34

medial border of scapula

Question 35

nerve of rhomboid major

Answer 35

dorsal scapular nerve

Question 36

action of rhomboid major

Answer 36

raises medial border of scapula upward and medially

Question 37

origin of deltoid

Answer 37

lateral third of clavicle, acromion, spine of scapula

Question 38

insertion of deltoid

Answer 38

middle of lateral surface of shaft of humerus

Question 39

nerve of deltoid

Answer 39

axillary nerve

Question 40

action of deltoid

Answer 40

abducts arm; anterior fibers flex and medially rotate arm; posterior fibers extend and laterally rotate arm

Question 41

origin of supraspinatus

Answer 41

supraspinous fossa of scapula

Question 42

insertion of supraspinatus

Answer 42

greater tuberosity of humerus; capsule of shoulder joint

Question 43

nerve of supraspinatus

Answer 43

suprascapular nerve

Question 44

action of supraspinatus

Answer 44

abducts arm and stabilizes shoulder joint

Question 45

origin of infraspinatus

Answer 45

infraspinous fossa of scapula

Question 46

insertion of infraspinatus

Answer 46

greater tuberosity of humerus; capsule of shoulder joint

Question 47

nerve of infraspinatus

Answer 47

suprascapular nerve

Question 48

action of infraspinatus

Answer 48

laterally rotates arm and stabilizes shoulder joins

Question 49

origin of teres major

Answer 49

lower third of lateral border of scapula

Question 50

insertion of teres major

Answer 50

medial lip of bicipital groove of humerus

Question 51

nerve of teres major

Answer 51

lower subscapular nerve

Question 52

action of teres major

Answer 52

medially rotates and adducts arm and stabilizes shoulder joint

Question 53

origin of teres minor

Answer 53

upper two thirds of lateral border of scapula

Question 54

insertion of teres minor

Answer 54

greater tuberosity of humerus; capsule of shoulder joint

Question 55

nerve of teres minor

Answer 55

axillary nerve

Question 56

action of teres minor

Answer 56

laterally rotates arm and stabilizes shoulder joint

Question 57

origin of subscapularis

Answer 57

subscapular fossa

Question 58

insertion of subscapularis

Answer 58

lesser tuberosity of humerus

Question 59

nerve of subscapularis

Answer 59

upper and lower subscapular nerves

Question 60

action of subscapularis

Answer 60

medially rotates arm and stabilizes shoulder joint

Question 61

origin of long head of biceps brachii

Answer 61

supraglenoid tubercle of scapula

Question 62

insertion of long head biceps brachii

Answer 62

tuberosity of radius and bicipital aponeurosis into deep fascia of forearm

Question 63

nerve of long head biceps brachii

Answer 63

musculocutaneous nerve

Question 64

action of long head biceps brachii

Answer 64

supinator of forearm and flexor of elbow joint; weak flexor of shoulder joint

Question 65

origin of short head biceps brachii

Answer 65

coracoid process of scapula

Question 66

insertion of short head biceps brachii

Answer 66

tuberosity of radius and bicipital aponeurosis into deep fascia of forearm

Question 67

nerve of short head biceps brachii

Answer 67

musculocutaneous nerve

Question 68

action of short head biceps brachii

Answer 68

supinator of forearm and flexor of elbow joint; weak flexor of shoulder joint

Question 69

origin of coracobrachialis

Answer 69

coracoid process of scapula

Question 70

insertion of coracobrachialis

Answer 70

medial aspect of shaft of humerus

Question 71

nerve of coracobrachialis

Answer 71

musculocutaneous nerve

Question 72

action of coracobrachialis

Answer 72

flexes arm and also process of weak adductor

Question 73

origin of brachialis

Answer 73

front of lower half of humerus

Question 74

insertion of brachialis

Answer 74

coronoid process of ulna

Question 75

nerve of brachialis

Answer 75

musculocutaneous nerve

Question 76

action of brachialis

Answer 76

flexor of elbow joint

Question 77

origin of long head of triceps

Answer 77

infraglenoid tubercle of scapula

Question 78

origin of lateral head of triceps

Answer 78

upper half of posterior surface of shaft of humerus

Question 79

origin of medial head of triceps

Answer 79

lower half of posterior surface of shaft of humerus

Question 80

insertion of long, lateral, and medial head of triceps

Answer 80

olecranon process of ulna

Question 81

nerve of long, lateral, and medial head of triceps

Answer 81

radial nerve

Question 82

action of long, lateral, and medial head of triceps

Answer 82

extensor of elbow joint