Muscles Quiz 2/Back and shoulder/Arm

Question 1

Deltoid Action

Answer 1

Abduction, flexion/extension, medial/lateral rotation

Question 2

Deltoid Origin

Answer 2

The acromial end of the clavicle, the acromion process of the scapula, and the spine of the scapula

Question 3

Deltoid Insertion

Answer 3

Deltoid tuberosity of the humerus

Question 4

Deltoid Nerve Supply

Answer 4

Axillary Nerve (also sensory branch of the lateral shoulder)

Question 5

Trapezius Action

Answer 5

Elevation/depression of scapula, and retraction of the scapula

Question 6

Trapezius Origin

Answer 6

Occipital bone of the skull, cervical and thoracic vertebrae (C7-T12)

Question 7

Trapezius Insertion

Answer 7

Posterior aspect of the clavicle, acromion process and spine of the scapula

Question 8

Trapezius Nerve Supply

Answer 8

Accessory nerve

Question 9

Latissimus Dorsi Action

Answer 9

Extends, adducts, and medially rotates the shoulder

Question 10

Latissimus Dorsi Origin

Answer 10

Thoracic and lumbar vertebrae (T7-T12 and L1-L5), and the iliac crest of the ilium

Question 11

Latissimus Dorsi Insertion

Answer 11

Intertubercular groove of the humerus

Question 12

Latissimus Dorsi Nerve Supply

Answer 12

Thoracodorsal

Question 13

Coracobrachialis Action

Answer 13

Shoulder flexion/adduction

Question 14

Coracobrachialis Origin

Answer 14

Coracoid process of the scapula

Question 15

Coracobrachialis Insertion

Answer 15

Humeral shaft (about 1/2 way down)

Question 16

Coracobrachialis Nerve Supply

Answer 16

Musculocutaneous (sensory for the anterolateral forearm)

Question 17

Supraspinatus Action

Answer 17

Abducts shoulder

Question 18

Supraspinatus Origin

Answer 18

Supraspinous fossa of the scapula

Question 19

Supraspinatus Insertion

Answer 19

Greater tubercle of the humerus

Question 20

Supraspinatus Nerve supply

Answer 20

Suprascapular

Question 21

Infraspinatus Origin

Answer 21

Infraspinous fossa of the scapula

Question 22

Infraspinatus Action

Answer 22

Laterally rotates shoulder

Question 23

Infraspinatus Insertion

Answer 23

Greater tubercle of the humerus

Question 24

Infraspinatus Nerve supply

Answer 24

Suprascapular

Question 25

Teres Minor Action

Answer 25

Laterally rotates shoulder

Question 26

Teres Minor Origin

Answer 26

Lateral border of the scapula

Question 27

Teres Minor Insertion

Answer 27

Greater tubercle of the humerus

Question 28

Teres Minor nerve supply

Answer 28

Axillary

Question 29

Subscapularis Action

Answer 29

Medially rotates shoulder

Question 30

Subscapularis Origin

Answer 30

Subscapular fossa of the scapula

Question 31

Subscapularis Insertion

Answer 31

Lesser tubercle of humerus

Question 32

Subscapularis Nerve Supply

Answer 32

Upper and lower subscapular

Question 33

Teres Major Action

Answer 33

Medially rotates shoulder

Question 34

Teres Major Origin

Answer 34

Inferior angle of scapula

Question 35

Teres Major Insertion

Answer 35

Intertubercular groove of the humerus

Question 36

Teres Major Nerve Supply

Answer 36

Lower subscapular

Question 37

Rhomboids (major and minor) Action

Answer 37

Elevates and retracts scapula

Question 38

Rhomboids (major and minor) Origins

Answer 38

Cervical and thoracic vertebrae

Question 39

Rhomboids (major and minor) Insertions

Answer 39

Medial border of the scapula

Question 40

Rhomboids (major and minor) Nerve supply

Answer 40

Dorsal Scapular

Question 41

Levator Scapulae Action

Answer 41

elevates and retracts the scapula

Question 42

Levator Scapulae Origin

Answer 42

Cervical vertebrae

Question 43

Levator Scapulae Insertions

Answer 43

Medial border of the scapula

Question 44

Levator Scapulae Nerve Supply

Answer 44

Dorsal Scapular

Question 45

Biceps Brachii Action

Answer 45

Flexes shoulder and elbow, supinates forearm

Question 46

Biceps Brachii Origin

Answer 46

Short head: Coracoid process of scapula Long head: Supraglenoid tubercle of the scapula

Question 47

Biceps Brachii Insertion

Answer 47

Radial tuberosity of the radius

Question 48

Biceps Brachii Nerve Supply

Answer 48

Musculocutaneous (sensory for the anterolateral forearm)

Question 49

Brachialis Action

Answer 49

Flexes elbow

Question 50

Brachialis Origin

Answer 50

Anterior shaft of the humerus

Question 51

Brachialis Insertion

Answer 51

Coronoid process of ulna

Question 52

Brachialis Nerve Supply

Answer 52

Musculocutaneous Nerve (sensory for the anterolateral forearm)

Question 53

Triceps Brachii Action

Answer 53

Extends shoulder and elbow

Question 54

Triceps Brachii Origin

Answer 54

Long head: infraglenoid tubercle of the scapula Lateral/medial heads: Posterior shaft of the humerus

Question 55

Triceps Brachii Insertion

Answer 55

Olecranon process of the ulna

Question 56

Triceps Brachii Nerve Supply

Answer 56

Radial (posterior surface of arm and forearm, posterolateral surface of the hand)