Shoulder and Arm

Question 1

Deltoid Action

Answer 1

All: Abduct
Anterior: Flex, medially rotate, horizontally adduct
Posterior Extend, laterally rotate, horizontally abduct

Question 2

Deltoid Origin

Answer 2

Lateral one-third of clavicle, acromion, and spine scapula

Question 3

Deltoid Insertion

Answer 3

Deltoid tuberosity

Question 4

Trapezius Action

Answer 4

Upper Bilaterally: extend head and neck
Upper Unilaterally: Laterally flex head and neck to the same side, rotate head and neck to opposite side, elevate scapula, upwardly rotate scapula
Middle: adduct scapula, stabilize scapula
Lower: depress scapula, upwardly rotate scapula

Question 5

Trapezius Origin

Answer 5

External occipital protuberance, medial portion of superior nuchal line of the occiput, ligamentum nuchae, and spinous processes of C-7 through T-12

Question 6

Trapezius Insertion

Answer 6

Same as Deltoid Origin

Question 7

Latissimus Dorsi Action

Answer 7

Extend, adduct, medially rotate

Question 8

Latissimus Dorsi Origin

Answer 8

Inferior angle of the scapula, spinous processes of last six thoracic vertebrae, last three of four ribs, thoracolumbar fascia and posterior iliac crest

Question 9

Latissimus Dorsi Insertion

Answer 9

The intertubercular groove of the humerus

Question 10

Teres Major Action

Answer 10

Extend, Adduct, medially rotate

Question 11

Teres Major Origin

Answer 11

Inferior angle and lower one-third of lateral border of the scapula

Question 12

Teres Major Insertion

Answer 12

Crest of the lesser tubercle of the humerus

Question 13

Supraspinatus Action

Answer 13

Abduct, stabilize head of humerus in glenoid cavity

Question 14

Supraspinatus Origin

Answer 14

Supraspinous fossa of the scapula

Question 15

Supraspinatus Insertion

Answer 15

Greater tubercle of the humerus

Question 16

Infraspinatus Action

Answer 16

Laterally rotate, adduct, stabilize head of humerus in glenoid cavity

Question 17

Infraspinatus Origin

Answer 17

infraspinous fossa of the scapula

Question 18

Infraspinatus Insertion

Answer 18

Same as Supraspinatus

Question 19

Teres Minor Action

Answer 19

Same as Infraspinatus

Question 20

Teres Minor Origin

Answer 20

Upper two-thirds of lateral border of the scapula

Question 21

Teres Minor Insertion

Answer 21

Same as Supraspinatus

Question 22

Subscapularis Action

Answer 22

Medially rotate, stabilize head of humerus in glenoid cavity

Question 23

Subscapularis Origin

Answer 23

Subscapular fossa of the scapula

Question 24

Subscapularis Insertion

Answer 24

Lesser tubercle of the humerus

Question 25

Rhomboids Action

Answer 25

Adduct, elevate scapula, downwardly rotate scapula

Question 26

Rhomboids Origin

Answer 26

Major: Spinous process of T-12 to T-5 Minor: Spinous process of C-7 and T-1

Question 27

Rhomboids Insertion

Answer 27

Major: Medial border of the scapula between the spine of the scapula and the inferior angle Minor: Upper portion of medial border of the scapula, across from spine of the scapula

Question 28

Levator Scapula Action

Answer 28

Unilaterally: elevate scapula, downwardly rotate scapula, laterally flex head and neck, rotate head and neck to the same side Bilaterally: extend head and neck

Question 29

Levator Scapula Origin

Answer 29

Transverse processes of first through fourth cervical vertebrae

Question 30

Levator Scapula Insertion

Answer 30

Medial border of scapula, between superior angle and superior portion of spine of scapula

Question 31

Serratus Anterior Action

Answer 31

With origin fixed: abduct scapula, upwardly rotate scapula, depress scapula, hold medial border of the scapula against the rib cage With scapula fixed: may act to elevate the thorax during forced inhalation

Question 32

Serratus Anterior Origin

Answer 32

External surfaces of upper eight or nine ribs

Question 33

Serratus Anterior Insertion

Answer 33

The anterior surface of the medial border of the scapula

Question 34

Pectoralis Major Action

Answer 34

All: adduct, medially rotate, assist to elevate the thorax during forced inhalation Upper: flex, horizontally adduct Lower: extend

Question 35

Pectoralis Major Origin

Answer 35

Medial half of clavicle, sternum, and cartilage of first through sixth ribs

Question 36

Pectoralis Major Insertion

Answer 36

Crest of greater tubercle of humerus

Question 37

Pectoralis Minor Action

Answer 37

Depress scapula, abduct scapula, downwardly rotate the scapula With scapula fixed: assist to elevate the thorax during forced inhalation

Question 38

Pectoralis Minor Origin

Answer 38

Third, fourth and fifth ribs

Question 39

Pectoralis Minor Insertion

Answer 39

Medial surface of coracoid process of the scapula

Question 40

Biceps Brachii Action

Answer 40

Flex elbow, supinate forearm, flex

Question 41

Biceps Brachii Origin

Answer 41

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

Question 42

Biceps Brachii Insertion

Answer 42

Tuberosity of the radius and aponeurosis of the biceps brachii

Question 43

Triceps Brachii Action

Answer 43

All heads: extend elbow Long head: extend, adduct

Question 44

Triceps Brachii Origin

Answer 44

Long head: infraglenoid tubercle of scapula Lateral head: posterior surface of proximal half of the humerus Medial head: posterior surface of distal half of the humerus

Question 45

Triceps Brachii Insertion

Answer 45

Olecranon process of the ulna

Question 46

Coracobrachialis Action

Answer 46

Flex, adduct

Question 47

Coracobrachialis Origin

Answer 47

Coracoid process of scapula

Question 48

Coracobrachialis Insertion

Answer 48

Medial surface of mid-humeral shaft