Chapter 5, The Shoulder Joint

Front 1

the shoulder joint is attached to the axial skeleton via the clavicle at the _____ joint.

Back 1

SC joint

Front 2

scapula movement occurs with movement of the ?

Back 2

humerus

Front 3

humeral flexion and abduction require scapula ___, ____, and ____

Back 3

scapula elevation, rotation upward, and abduction

Front 4

humeral adduction and extension results in ___, ____, _____

Back 4

scapula depression, rotation downward, and adduction

Front 5

Scapula abduction occurs with ______, and ______

Back 5

humeral internal rotation, and horizontal adduction

Front 6

scapula adduction occurs with ____, and ____

Back 6

humeral external rotation, and horizontal abduction

Front 7

Significant amounts of laxity is needed in the shoulder joint due to many different motions performed. T/F?

Back 7

true

Front 8

what are two types of common injuries to the shoulder?

Back 8

rotator cuff, and subluxations and dislocations

Front 9

with high mobility, stability is ____?

Back 9

reduced

Front 10

the more mobile a joint is the ____ stable it is, whereas the more stable a joint is, the _____ mobile it is

Back 10

less, less

Front 11

what bones are involved for attachment of shoulder joint muscles?

Back 11

scapula, clavicle, humerus

Front 12

the GH joint is what type of joint?

Back 12

multi-axial, ball and socket

Front 13

the glenoid labrum ____ enhances stability.?

Back 13

slightly

Front 14

GH ligaments provide stability especially in what anatomical aspects?

Back 14

anteriorly and inferiorly (inferior GH Ligament)

Front 15

in order to gain mobility, what is sacraficed?

Back 15

stability

Front 16

ligemants are quite lax until extreme R.O.M are reached. T/F?

Back 16

true

Front 17

it is difficult to determine exact r.o.m due to what?

Back 17

accompanying shoulder girdle movement

Front 18

What does GIRD stand for?

Back 18

glenohumeral internal rotation deficit

Front 19

what is gird?

Back 19

it is the difference in internal rotation r.o.m btwn. an individuals throwing and non-throwin arm.

Front 20

stretching is reccomended to regain internal rotation. T/F?

Back 20

true

Front 21

for the following 8 shoulder joint movements, list there acoompanying shoulder girdle movements.
1.abduction
2.adduction
3.flexion
4.extension
5.internal rotation
6.external rotation
7.horizontal abduction
8.horizontal adduction

Back 21

1.upward rotation
2.downward rotation
3.elevation/upward rotation
4.depression/downward rotation
5.abduction (protraction)
6.adduction (retraction
7.adduction(retraction)
8.abduction(protraction)

Front 22

the GH joint is paired with the shoulder girdle to accomplish total r.o.m. T/F?

Back 22

true

Front 23

170-180 degrees of total abduction include:

Back 23

25 degrees of scapula elevation, ~60 degrees of scapula upward rotation, and 90-95 degrees of GH abduction

Front 24

scapulohumeral rhythm is _____ relationship w/ joints?

Back 24

synergistic

Front 25

what is the general ratio for scapulohumeral rhythm?

Back 25

2:1 being that for every 2 degrees of GH motion, there is 1 degree of scapula motion

Front 26

what is an exercise to associate with abduction and adduction?

Back 26

lateral raises and jumping jacks

Front 27

what is an exercise to associate with flexion/extension?

Back 27

front raises

Front 28

what is an exercise to associate with horizontal abduction and horizontal adduction?

Back 28

rear delt flys

Front 29

Diagonal abduction and diagonal adduction occur very frequently in ____?

Back 29

sports

Front 30

while standing in anatomical position, it forces us into what?

Back 30

external rotation

Front 31

in fundamental position, it forces us into ?

Back 31

some slight internal rotation

Front 32

what are the two extrinsic glenohumeral muscles?

Back 32

lat dorsi and pec major

Front 33

what are the intrinsic GH muscles?

Back 33

deltoid, coracobrachialis, and teres major

Front 34

is subscapularis ant. or post?

Back 34

anterior

Front 35

what two muscles work hand in hand all the time no matter the circumstances?

Back 35

infraspinatus, and teres minor

Front 36

what motion do the anterior delt fibers provide?

Back 36

abduction, flexion, horizontal adduction, and internal rotation

Front 37

what motions do the posterior delt fibers provide?

Back 37

abduction, extension, horizontal abduction, and external rotation

Front 38

middle delt fibers provide what potion?

Back 38

abduction

Front 39

can you isolate deltoid fibers?

Back 39

no

Front 40

upper pec major fibers over 90 degrees assist in what motion?

Back 40

abduction

Front 41

pec major fibers under 90 degrees assist in what action?

Back 41

adduction

Front 42

upper pec fibers generally assist in what motions?

Back 42

internal rotation, horizontal adduction, and flexion

Front 43

the lower pec major fibers assist in what motions?

Back 43

internal rotation, horizontal adduction, extension, and adduction

Front 44

the upper pec fibers are on what head of the clavicle?

Back 44

clavicular head

Front 45

the lower pec fibers are on what head of the clavicle?

Back 45

sternal head

Front 46

what motions do the lats do?

Back 46

adduction, extension, internal rotation, and horizontal abduction

Front 47

teres major muscle does what actions?

Back 47

extension, internal rotation, and adduction (coming down from abduction)

Front 48

does the teres major work with the infraspinatus?

Back 48

no

Front 49

what motions does the coracobrachialis produce?

Back 49

flexion, adduction, horizontal adduction

Front 50

where does the coracobrachialis attach?

Back 50

coracoid process

Front 51

where does the supraspinatus attach?

Back 51

the greater tubercle from above

Front 52

where does the infraspinatus attach?

Back 52

the greater tubercle posteriorly

Front 53

where does the teres minor attach?

Back 53

the greater tubercle posteriorly

Front 54

where does the subscapularis attach?

Back 54

the lesser tubercle anteriorly

Front 55

infraspinatus an teres minor do what motion?

Back 55

ext. rotation, horizontal abduction, and extension

Front 56

subscapularis does what motion?

Back 56

internal rotation, adduction, and extension

Front 57

what motion does the supraspinatus provide?

Back 57

abduction,

Front 58

how large are the cuff muscles?

Back 58

not very large

Front 59

the 4 cuff muscles stabilize what?

Back 59

the humeral head in the glenoid fossa

Front 60

what are the agonists for GH flexion?

Back 60

ant. delt., upper pec major, and coracobrachialis

Front 61

what are the agonists for GH extension?

Back 61

teres major, lat dorsi, lower pec major (sternal Head)

Front 62

what are the agonists for GH abduction?

Back 62

deltoid, supraspinatus, upper pec major

Front 63

what are the agonists for GH adduction?

Back 63

lat dorsi, teres major, lower pec major

Front 64

what are the agonists for GH internal rotation?

Back 64

lats, teres major, subscapularis, and pec major

Front 65

what is unique about the muscles for internal rotation?

Back 65

they all attach anteriomedially to the humerus

Front 66

what are the 2 muscles for ext. rotation?

Back 66

teres minor and infraspinatus

Front 67

both muscles for external rotation attach where?

Back 67

posteriorly on the greater tubercle

Front 68

what are the agonists for horizontal abduction?

Back 68

post. delt, mid delt, infraspinatus, and teres minor

Front 69

what are the agonists for horizontal adduction?

Back 69

ant. delt, pec major, and coracobrachialis

Front 70

what are the agonists for Gh diagonal abduction?

Back 70

post. delt, infraspinatus, teres minor, triceps brachii (long head)

Front 71

what are the agonists for GH diagonal adduction?

Back 71

ant. delt, coracobrachialis, biceps brachii (short head), pec major (upper and lower)