Unit 3 Exam

Question 1

ER causes the head of the humerus to move

Answer 1

Anterior

Question 2

IR causes the head of the humerus to move

Answer 2

Posterior

Question 3

Abduction causes ____ translation of the humeral head

Answer 3

Inferior

Question 4

Abduction causes ___ translation of the humeral head

Answer 4

Inferior

Question 5

Scapulothoracic Junction

Answer 5

Depends completely on muscular control and support. Very important to give shoulder joint a mechanical advantage and keep bigger muscles in a better position

Question 6

Scapulohumeral Rhythm

Answer 6

Every 15 degrees of humeral movement you get 10 degrees of scapular movement; most of it happens in early abduction (Ratio 1.25:1)

Question 7

Rotator Cuff Force

Answer 7

Holds humeral head against glenoid fossa, especially with arm in low degrees of abduction

Question 8

Biceps brachii tendon force

Answer 8

Pulls and tightens humeral head against glenoid fossa

Question 9

Flexion (spin and glide)

Answer 9

Anterior spin, posterior glide

Question 10

Extension (spin and glide)

Answer 10

Posterior spin, anterior glide

Question 11

What does the subacromial space contain?

Answer 11

b/t head of humerus and acromion
area for rotator cuff (supraspinatus)
long head biceps
subacromial and subdeltoid bursae

Question 12

Glenoid Labrum

Answer 12

Cartilaginous disc that deepens cavity and increases stability
Attaches to biceps tendon

Question 13

What 3 joints make up the shoulder?

Answer 13

SC, AC, GH

Question 14

This joint is the only bony attachment to the body

Answer 14

SC Joint

Question 15

The SC joint is a ________________ joint

Answer 15

Saddle (Sellar)

Question 16

In a SC joint, the ________________ moves on ______________

Answer 16

clavicle, disc

Question 17

This allows for more movement in the SC joint

Answer 17

Interarticular disc

Question 18

with elevation/depression in the SC joint, the axis of motion is _____________

Answer 18

Oblique

Question 19

For elevation at the SC joint the motion is ________ and _________

Answer 19

upward, backward

Question 20

For depression at the SC join the motion is ___________ and __________

Answer 20

downward, forward

Question 21

For protraction/retraction at the SC joint, the axis of motion is nearly ____________ and passes through the ______________

Answer 21

vertical, manubrium

Question 22

For protraction/retraction at the SC joint, the movement is between the _______________ and the _____________

Answer 22

sternum, disc

Question 23

For ROTATION at the SC joint, the axis of motion is along the ____________ axis

Answer 23

long (horizontal)

Question 24

Rotation at the SC joint occurs when ______________ ligament tightens

Answer 24

conoid

Question 25

SC support

Answer 25

Articular capsule, Anterior/Posterior SC ligaments, Interclavicular Ligaments, Costoclavicular Ligaments

Question 26

Accessory Motions

Answer 26

unconscious motions that must occur in order for main motion to occur

Question 27

___________ __________ __________ is the least amount of motion due to the ligaments being the tightest; max surface contact of joint

Answer 27

Closed Packed Position

Question 28

closed packed position of the SC joint is when the arm is _______________

Answer 28

Fully Elevated

Question 29

The AC joint is a _____________ joint

Answer 29

plane (glide)

Question 30

In the AC joint the convex part is the______________ and the concave part is the ___________

Answer 30

clavicle, acromion

Question 31

AC Support

Answer 31

``` Articular Capsule, Superior/Inferior AC Trapezoid Ligament, Conoid Ligament, Coracoacromial Ligament ```

Question 32

This ligament at the AC joint pulls down on the clavicle

Answer 32

Conoid

Question 33

These two ligaments make up the coracoclavicular ligament

Answer 33

Conoid and Trapezoid

Question 34

The closed packed position in the AC joint is when the arm is __________

Answer 34

at 90 degrees

Question 35

``` The GH joint has _________ ROM, __________ ligament support, ___________ stability from bone, ____________ stability from muscles ```

Answer 35

wide thin little large

Question 36

Flexion at the GH joint with the scapula stabilized is ____________ degrees , but when the scapula is NOT stabilized it is from _____________ degrees

Answer 36

90, 165-175

Question 37

Extension at the GH joint when the scapula is stabilized is from _____________ degrees, and when the scapula is NOT stabilized it is from _____________

Answer 37

40-60, 40-75

Question 38

Abduction with a stabilized scapula depends on the _________ of the humerus

Answer 38

Rotation

Question 39

With a stabilized scapla, abduction with the humerus externally rotating is ________ degrees

Answer 39

90

Question 40

With a stabilized scapula, abduction with the humerus internally rotating is __________ degrees

Answer 40

60

Question 41

Without a stabilized scapula, abduction is from _________ - __________

Answer 41

168-185

Question 42

Adduction is at ____________ degrees at the GH joint when in starting anatomical position

Answer 42

0

Question 43

during abduction the humerus has a(n) _______________ roll and a(n) _______________ glide

Answer 43

superior, inferior

Question 44

during adduction the humerus has a(n) _______________ roll and a(n) _______________ glide

Answer 44

Inferior, superior

Question 45

area between the head of the humerus and acromion

Answer 45

subacromial space

Question 46

These two muscles are found in the subacromial space

Answer 46

supraspinatus and biceps (long head)

Question 47

Why does the humeral head dislocate anteriorly more often?

Answer 47

slumped shoulders (we tend to position the humeral had forward)

Question 48

The action of the supraspinatus when at the humerus is at 90 degrees

Answer 48

Compression

Question 49

the action of the supraspinatus when the humerus is at 40 degrees or below

Answer 49

Abduction

Question 50

Elbow forearm complex

Answer 50

humeroulnar joint, humeroradial joint, proximal radioulnar joint, distal radioulnar joint

Question 51

Humeroradial Joint

Answer 51

convex capitulum into concave radial head | less stable so it needs more ligaments/muscles

Question 52

Flexion: humeroulnar joint

Answer 52

ulna glides on trochlea; at end range, coronoid process hits the floor of coronoid fossa concave on convex so motion and glide are in same direction

Question 53

The trochlear groove articulates with the...

Answer 53

Ulna

Question 54

why do you have less flexion when pronated vs supinated

Answer 54

radius gets in the way

Question 55

Flexion of the elbow requires...

Answer 55

Anterior glide of ulna on trochlea

Question 56

What is the name for a carrying angle greater than 20 degrees? knock elbows

Answer 56

cubitis valgus

Question 57

Transverse Ligament

Answer 57

b/w lesser & greater tubercles; holds biceps long head tendon

Question 58

Rotator Cuff Muscles

Answer 58

SITS | Supraspinatus, Infraspinatus, Teres Minor, Subscapularis

Question 59

Annular Ligament

Answer 59

Ligamentous ring that surrounds the head of the radius & anchors it close to the ulna

Question 60

Quadrate Ligament

Answer 60

Prevents extreme rotation of head of radius

Question 61

Muscles that can cause elbow flexion

Answer 61

Biceps brachii, brachialis, brachioradialis, pronator teres, extensor carpi radialis longus, extensor carpi radialis brevis

Question 62

Muscles that can cause elbow extension

Answer 62

Triceps brachii, Anconeus

Question 63

Muscles that can cause supination

Answer 63

Biceps brachii, supinator

Question 64

Muscles that can cause pronation

Answer 64

Pronator teres, pronator quadratus