Shoulder

Question 1

deltoid orgin

Answer 1

lateral 1/3 of clavicle, acromion process, and spine of the scapula

Question 2

deltoid insertion

Answer 2

deltoid tuberosity of the humerus

Question 3

deltoid actions

Answer 3

abducts the shoulder (all fibers)
flexes, internally rotates, and horizontally adducts shoulder (anterior fibers)

Question 4

pectoralis major orgin

Answer 4

medial clavicle
sternum
costal cartilages of ribs 1-7

Question 5

pectoralis major insertion

Answer 5

lateral lip of the bicipital groove of the humerus

Question 6

pectoralis major actions

Answer 6

flexes the shoulder (clavicular fibers)
extends the shoulder from overhead position (costal fibers)

Question 7

coracobrachialis orgin

Answer 7

coracoid process of the scapula

Question 8

coracobrachialis insertion

Answer 8

medial shaft, middle 1/3 of the humerus

Question 9

coracobrachialis actions

Answer 9

flexes and adducts the shoulder

Question 10

biceps brachaii orgin

Answer 10

long head: supraglenoid tubercle of the scapula
short head: coracoid process of the scapula

Question 11

biceps brachaii insertion

Answer 11

radial tuberosity and bicipital aponeurosis overlying common flexor tendon

Question 12

biceps brachaii actions

Answer 12

flexes, abducts (long head)
adducts (short head)
flexes and supinates the forearm

Question 13

pectoralis minor orgin

Answer 13

ribs 3-5

Question 14

pectoralis minor insertion

Answer 14

coracoid process of the scapula

Question 15

pectoralis minor actions

Answer 15

protracts and depresses the scapula
elevates ribs 3-5

Question 16

subclavius orgin

Answer 16

1st rib at the junction with the costocartilage

Question 17

subclavius insertion

Answer 17

inferior surface of the middle 1/3 of the clavicle

Question 18

subclavius actions

Answer 18

flexes the clavicle inferiorly or elevates the 1st rib

Question 19

trapezius orgin

Answer 19

entire muscle: occiput, nuchal ligament and spinous process of C7-T12

upper fibers: external occipital protuberance, medial 1/3 of the superior nuchal line of the occiput, nuchal ligament and spinous process of C7

middle fibers: spinous processes of T1-T5

lower fibers: spinous processes of T6-T12

Question 20

trapezius insertions

Answer 20

lateral 1/3 of the clavicle
acromion process
spine of the scapula

Question 21

levator scapulae orgin

Answer 21

transver processes of C1-C4

Question 22

levator scapulae insertion

Answer 22

superior angle of the scapula

Question 23

levator scapulae actions

Answer 23

elevates and downwardly rotates the scapula

extends, laterally flexes, and rotates the neck to the same side (ipsilaterally)

Question 24

trapezius actions

Answer 24

extends and laterally flexes the head and neck to the same side (ipsilaterally)

rotates the head and neck to the opposite side (contralaterally)

elevates and upwardly rotates the scapula (upper fibers)

retracts the scapula (entire muscle)

depresses and upwardly rotates the scapula (lower fibers)

Question 25

rhomboid major and minor orgin

Answer 25

minor: spinous processes of C7-T1

major: spinous processes of T2-T5

Question 26

rhomboid major and minor insertions

Answer 26

medial border of the scapula from the root of the spine to the inferior angle

Question 27

rhomboid major and minor actions

Answer 27

retracts, elevates, and downwardly rotates the scapula

Question 28

latissimus dorsi orgins

Answer 28

spinous processes of T7-L5
posterior iliac crest
posterior sacrum (via thoracolumbar aponeurosis)

Question 29

latissimus dorsi insertions

Answer 29

medial lip of the bicipital groove of the humerus

Question 30

latissimus dorsi actions

Answer 30

adducts the shoulder
horizontally abducts the shoulder
extends the shoulder
internally rotates the shoulder

Question 31

teres major orgin

Answer 31

posterior surface of the inferior angle of the scapula

Question 32

teres major insertion

Answer 32

medial lip of the bicipital groove on the humerus

Question 33

teres major actions

Answer 33

adducts the shoulder
extends the shoulder
internally rotates the shoulder

Question 34

serratus anterior orgin

Answer 34

later surfaces of upper 8 or 9 ribs

Question 35

serratus anterior insertion

Answer 35

costal surface of medial border of the scapula

Question 36

serratus anterior actions

Answer 36

protracts, depresses, and upwardly rotates the scapula

assists with forced inspiration when the insertion is fixed

Question 37

supraspinatus orgin

Answer 37

supraspinous fossa of the scapula

Question 38

supraspinatus insertion

Answer 38

greater tubercle of the humerus

Question 39

supraspinatus actions

Answer 39

initiates abduction of the shoulder

Question 40

infraspinatus orgin

Answer 40

infraspinous fossa of the scapula

Question 41

infraspinatus insertion

Answer 41

greater tubercle of the humerus

Question 42

infraspiantus actions

Answer 42

externally rotates, extends, and horizontally abducts the shoulder

Question 43

teres minor orgin

Answer 43

upper 2/3 of the lateral border of the scapula

Question 44

teres minor insertion

Answer 44

greater tubercle of the humerus

Question 45

teres minor action

Answer 45

externally rotates, extends, adducts, and horizontally abducts the shoulder

Question 46

subscapularis orgin

Answer 46

subscapular fossa of the scapula

Question 47

subscapularis insertion

Answer 47

lesser tubercle of the humerus

Question 48

subscapularis actions

Answer 48

internally rotates the shoulder

Question 49

triceps brachaii orgin

Answer 49

long head: infraglenoid tubercle of the scapula

lateral head: proximal 1/2 of the posterior shaft of the humerus

media head: distal 1/2 of the posterior shaft of the humerus

Question 50

triceps brachaii insertion

Answer 50

olecranon prcoess of the ulna

Question 51

triceps brachaii actions

Answer 51

extends and adducts the shoulder (long head)

extends the elbow