Unit 5 Lecture 1

Question 1

What does the scapulohumeral rhythm do?

Answer 1

The cooperation of the scapula with the movements of the humerus

Question 2

Where does the scapular movement place the shoulder socket?

Answer 2

In the most favorable position for the head of the humerus

Question 3

What movement does the girdle do?

Answer 3

Movement of the scapula on your back

Question 4

What is protraction?

Answer 4

Moves shoulders forward

Question 5

What is retraction?

Answer 5

Moves shoulders backwards

Question 6

What type of joint is the sternoclavicular joint?

Answer 6

Saddle joint

Question 7

What does the sternoclavicular do?

Answer 7

Permits limited motion of the clavicle

Question 8

What is the sternoclavicular partially responsible for?

Answer 8

Movements of the scapula

Question 9

The sternoclavicular is the only what?

Answer 9

Bony connection between the humerus and axial skeleton

Question 10

What do the clavicle movements at the SC joint consist of?

Answer 10

Elevation and depression, protraction and retraction, and forward and backward rotation

Question 11

What is the acromioclavicular joint?

Answer 11

Joint between the clavicle and the acromion process of the scapula

Question 12

What are the anterior muscles of the shoulder girdle?

Answer 12

Pectoralis major and serratus anterior

Question 13

What are the posterior muscles of the shoulder girdle?

Answer 13

Levator scapulae, rhomboids, and trapezius

Question 14

Pectoralis minor origin and insertion

Answer 14

Scapula and ribs

Question 15

What actions do the Pectoralis minor perform

Answer 15

Draws scapula downward and lifts rubs in forceful inspiration

Question 16

Serratus anterior origin and insertion

Answer 16

Scapula and ribs

Question 17

Action of the serratus anterior

Answer 17

Prime mover of protraction

Question 18

What muscle is known as boxers muscle

Answer 18

Serratus

Question 19

Trapezius origin and insertion

Answer 19

Skull and vertebrae and scapula and clavicle

Question 20

Actions of trapezius

Answer 20

Neck lateral flexion, retraction, and depending on which fibers are active it can do upward and downward rotation of the scapula

Question 21

What is the origin and insertion of the levator scapulae?

Answer 21

Cervical vertebrae and scapula

Question 22

Actions of the levator scapulae

Answer 22

Scapular elevation, downward rotation of scapula, and neck lateral flexion

Question 23

What muscle is the common cause of stiff neck?

Answer 23

Levator scapulae

Question 24

Rhomboids origin and insertion

Answer 24

Vertebrae and scapula

Question 25

Action of the rhomboids

Answer 25

Scapula retraction and rotators glenoid cavity downward

Question 26

What joint is the glenohumeral joint?

Answer 26

Shoulder joint

Question 27

What is the most freely moving joint in the body?

Answer 27

Glenohumeral joint

Question 28

What does the numeral head articulate with?

Answer 28

The shallow glenoid fossa of the scapula

Question 29

What does the glenoid labrum deepen?

Answer 29

The fossa and cushions again the impact of numeral head in forceful movements

Question 30

What type of tissues does the glenoid labrum use to deepen shoulder socket?

Answer 30

Soft tissues

Question 31

Anterior shoulder muscles

Answer 31

Pectoralis major, coracobrachialis, subscapularis, and biceps brachii

Question 32

Superior shoulder muscles

Answer 32

Deltoids and supraspinnatus

Question 33

Posterior shoulder muscle

Answer 33

Infraspinatus and teres minor

Question 34

Inferior shoulder muscles

Answer 34

Latissimus dorsi, teres major, and triceps brachii (long head)

Question 35

Pectoralis major origin and insertion

Answer 35

Sternum and clavicle, and humerus

Question 36

Action of Pectoralis major

Answer 36

Shoulder flexion, medial rotation, and adduction

Question 37

Coracobrachialis origin and insertion

Answer 37

scapula and humerus

Question 38

Action of coracobrachialis

Answer 38

Shoulder flexion and adduction

Question 39

Subscapularis origin and insertion

Answer 39

Scapula and hunerus

Question 40

Action of subscapularis

Answer 40

Prime mover of shoulder internal rotation

Question 41

Biceps brachii origin and insertion

Answer 41

Scapula and radius

Question 42

Actions of biceps brachii

Answer 42

Shoulder flexion, elbow flexion, and radioulnar supination

Question 43

Infraspinatus and teres minor origin and insertion

Answer 43

Scapula and humerus

Question 44

Action of Infraspinatus and teres minor

Answer 44

Lateral rotation of shoulder

Question 45

Deltoid origin and insertion

Answer 45

Clavicle and scapula, and humerus

Question 46

Actions of deltoid

Answer 46

Prime mover of shoulder

Question 47

If only anterior fibers are acting in deltoid what are its actions?

Answer 47

Flexion, horizontal adduction, and medial rotation

Question 48

If only posterior fibers are acting in deltoid then what are it’s actions?

Answer 48

Extension, horizontal abduction, and lateral rotation

Question 49

Supraspinatus origin and insertion

Answer 49

Scapula and humerus

Question 50

Action of supraspinatus

Answer 50

Stabilizes shoulder when carrying something and shoulder adduction

Question 51

What are the four rotator cuff muscles?

Answer 51

Subscapularis, supraspinatus, Infraspinatus, and teres minor

Question 52

What rotator cuff is torn most in throwers?

Answer 52

External rotator

Question 53

What is the mechanism of rotator tear in throwers?

Answer 53

When trying to stop internal rotation

Question 54

What rotator cuff is commonly torn in regular people?

Answer 54

Supraspinatus

Question 55

What is Supraspinatus impingement syndrome?

Answer 55

Occurs when repeated forceful abduction movements happen

Question 56

Latissimus dorsi origin and insertion

Answer 56

Origin: Pelvis, ribs, and lumbar vertebraE Insertion: Humerus

Question 57

Actions of Latissimus dorsi

Answer 57

Prime mover of shoulder extension, also does adduction and medial rotation

Question 58

Teres major origin and insertion

Answer 58

Scapula and humerus

Question 59

Actions of teres major

Answer 59

Shoulder extension, adduction, and medial rotator

Question 60

What is the teres major also known as?

Answer 60

Lats little buddy

Question 61

Triceps brachii origin and humerus

Answer 61

Origin: scapula and humerus Insertion: ulna

Question 62

Actions of triceps brachii

Answer 62

Prime mover of elbow extension, shoulder stabilization, and adduction