lecture 8: rectoral region & shoulder

Question 1

What is a synovial joint

Answer 1

where the distal ends of 2 bones articulate

Question 2

do synovial joints have articular cartilage

Answer 2

yes

Question 3

a synovial joint has has a

Answer 3

joint “articular” capsule- outer fibrous/ inner synovial membrane

Question 4

does a synovial joint have a fluid filled joint cavity

Answer 4

yes

Question 5

WHat is a functional joint

Answer 5

has NO joint cavity and is help together by soft tisses

Question 6

how many joints of the shoulder are there

Answer 6

4

Question 7

what are the 4 joints of the shoulder

Answer 7

glenohumeral joint
acromionclavicular joint
sternoclavicular joint
scapulothoracol joint

Question 8

which joints are anatomical joints

Answer 8

sc joint
ac joint
gh joint

Question 9

which joint is the functional joint

Answer 9

scapulothoracic joint

Question 10

where does the ST joint articulate

Answer 10

between the rib cage and the anterior surface of the scapula

Question 11

which joint hold the arm in place to the whole body

Answer 11

the sternoclavicular joint

Question 12

where does the GH joint articulate

Answer 12

the humerus articulates with the glenoic cavity

Question 13

where does the AC joint articulate

Answer 13

the acromion process articulates with the clavicle

Question 14

where does the SC joint articulate

Answer 14

the clavicle articulates with the sternum

Question 14

what are the 3 muslces for upward rotation of the scapula

Answer 14

upper trap
lower trap
serratus anterior

Question 15

what is the function of the ST joint

Answer 15

moves the scapula into upward rotation

Question 16

the brachium refers to the

Answer 16

upper portion of the arm above the elbow

Question 17

the antebrachium refers to the

Answer 17

lower portion of the arm below the elbow

Question 18

what muscles of the brachium preform flexion

Answer 18

the anterior compartment

Question 19

what muscles of the brachium perform extension

Answer 19

posterior compartment

Question 20

what splits the numerus into medial and lateral parts

Answer 20

the radial groove

Question 21

what artery goes into the arm

Answer 21

right subclavian artery

Question 22

what splits into w parts with one going to the arm and other going into the brain

Answer 22

the brachiocephalic trunk

Question 23

what is a network that is interlinked to where if 1 part of the artery gets a bloodclot or is unable to get blood into a certain part of the body it allows for other arteries to sprout out to area that did not reserve the blood

Answer 23

anastomoses

Question 24

what branches after the brachiocepthalic trunk to the right

Answer 24

the right subclavian artyery

Question 25

what is the first to come off the heart

Answer 25

the brachiocephalic artery

Question 26

after the right subclavian artery what does the artery turn into

Answer 26

the axillary artery

Question 27

when does the axillary artery begin

Answer 27

begins at lateral border of the first rib

Question 28

does the axillary artery go over or under the clavicle

Answer 28

under

Question 29

what does the axillary artery go and form to

Answer 29

the brachial artery

Question 30

when does the brachial artery start

Answer 30

it begins at the inferior border of the teres major muscle

Question 31

what is the deep artery of the arm

Answer 31

profunda brachii artery

Question 32

after the brachial artery it turns into the

Answer 32

profunda brachii artery

Question 33

where does the profunda brachii artery travel in

Answer 33

travels in the radial groove

Question 34

what are the 6 shoulder movements

Answer 34

flexion extension adductin abdcution internal rotation external rotation

Question 35

what is a suprascapular nerve entrapment caused by

Answer 35

hypertrophy of the suprascapular nerve

Question 36

what ligament does the suprascpaular nerve get emtraped by

Answer 36

superior transverse scapular ligament

Question 37

does the suprscapular nerve go under or over the ligament

Answer 37

under

Question 38

what artery goes over the superior transverse ligament

Answer 38

suprascapular artery

Question 39

what artery does the supra scapular artery come off of

Answer 39

the right subclavian artery

Question 40

what muscles will start to hypertrophy if the suprascapular nerve is entraped

Answer 40

the supraspinatus and infraspinatus

Question 41

what is another space that is a potential site of entrapment

Answer 41

subacrominal space

Question 42

what are the 3 types of acromion

Answer 42

type 1- flat type 2- curved type 3- hooked

Question 43

what are the 3 muscles usually torn in the RTC

Answer 43

supraspinatus infraspinatus teres minor

Question 44

what are the 3 types of terars of the RTC

Answer 44

articular side bursal side full thickness side

Question 45

what type of joint is the glenohumeral joint

Answer 45

ball in socket

Question 46

what type of caritlage is the glenoid labrum

Answer 46

fibrocartilage "o" ring

Question 47

what is the glenoid labrum connected to

Answer 47

long head of the biceps

Question 48

what is a injury that is common in baseball players and it is a tear in the labrum

Answer 48

slap tear injuries

Question 49

what is the scapulohumeral rhythm

Answer 49

the movement between the ST joint and the GH joint when elevating UE over head

Question 50

how does the scapulothoracic joint more when lifting your arm over head

Answer 50

upwardly rotation , protracting and posteriorly tiliting

Question 51

how does the GHJ move when elevating the UE overhead

Answer 51

the GHJ MUST externally rotate

Question 52

what is the total shoulder motion

Answer 52

180 degrees

Question 53

what is the degress of the STJ during total shoulder motion

Answer 53

60 degrees

Question 54

what is the overall ration for the scapulohumeral rhythm

Answer 54

2:1 (for ever 3 degress of total ROM , 2 degrees of GHJ and 1 degrees at STJ

Question 55

so if the shoulder ROM was 120 degrees what would be the degrees for the STJ

Answer 55

120/3 = 40 so 40 degress of STJ

Question 56

is the movement of the scapulohumeral rhythm linear?

Answer 56

no

Question 57

early phase of SHR is

Answer 57

initial 30 degrees of abduction

Question 58

is there any scapular movement in the early phase of SHR

Answer 58

little to no motion

Question 59

the mid phase of SHR has how muhc ROM

Answer 59

30-120 degrees

Question 60

how much scapula movement is in the mid phase of SHR

Answer 60

1:1 ration

Question 61

what is the degress of motion in the late phase in the SHR

Answer 61

120-180 degrees

Question 62

what is the GHJ and ST joint ratio in the later phase in SHR

Answer 62

2-3:1

Question 63

how much distraction does the GHJ capsule allow for

Answer 63

2-3 cm

Question 64

the GHJ capsule is

Answer 64

lose in the shoulder can be oulled out anf stretched

Question 65

what are the 3 main ligamnets that give the GHJ capsule support

Answer 65

coracohumeral ligament superior glenohumeral ligament middle glenohumeral ligament

Question 66

when does the GHJ capsule and ligaments tighten most with the arm in

Answer 66

abduction and ER (90/90)

Question 67

what does it if someone is born loose

Answer 67

someone is born like that and it is bilateral

Question 68

what is the most moble joint in the body

Answer 68

is the shoulder

Question 69

what is a bursa

Answer 69

synoival membrane protubes thru aperture in fibrous membrane to form bursa

Question 70

where is a bursa between

Answer 70

tendons and fibrous membrane

Question 71

what thickens when you get older

Answer 71

subacrominal bursa

Question 72

the sternoclavicular joint is what type of joint

Answer 72

synovial saddle type

Question 73

what does the SC joint articulate with

Answer 73

head o the clavicle articulating with clavicular notch

Question 74

what type of cartilage is the SC joint

Answer 74

fibrocartilage artiicular disc "double jt"

Question 75

what are teh 3 degrees of freedom of the SC joint

Answer 75

elevation/depression protraction/retraction posterior/anterior rotation

Question 76

which ligaments resist excessive anterior and posterior motion?

Answer 76

anterior and posterior sternoclavicular ligament

Question 77

which ligaments resist clavicular elevation and superior glide

Answer 77

costoclavicular ligemant

Question 78

what type of joint is the ACJ

Answer 78

synovial "plane" joint

Question 79

how many degrees of freedom is the ACJ

Answer 79

3 DOF

Question 80

is a ACJ a weak or strong joint capsule

Answer 80

week

Question 81

how is the acromion postioned to the clavicle

Answer 81

slightly inferior to distal clavicle

Question 82

which ligament is most lateral and glides the clavicle during rotation

Answer 82

trapezoid caracoclavicular ligament

Question 83

which ligament stabilizes the AC joint

Answer 83

acromioclavicular ligament

Question 84

which ligament is the roof of the subacrominal space

Answer 84

coracoacrominal ligament

Question 85

which ligament is triangular in shape and prevents vertical displacement

Answer 85

coracoclavicular ligament conoid

Question 86

is the clavicle higher than the acormion

Answer 86

yes

Question 87

there is usually a space between the acromion and clavicle which is what joint

Answer 87

acromioclavicular joint

Question 88

what region is a clavicular fx common in

Answer 88

centeral third region

Question 89

during the first 30 degress of shoulder flexion what does the clavicle have to do

Answer 89

the clavicle has to elevate

Question 90

first 30 degress of scapulothoracic joint needs

Answer 90

30 degress of clavicular elevation thru A-P axis of sternoclaviular joint

Question 91

the second 30 degrees of ST ROM needs to have how muhc degress of clavicular rotation

Answer 91

50 degress of clavicular rotation thru the longitudinal axis of the clavicle at the acromionclavicular joint

Question 92

which way does the clavicular rotate in the last 30 degress of scapular upward rotation

Answer 92

postioerly

Question 93

why is the shoulder the most commonly dislocated

Answer 93

it is very loose

Question 94

what is the most common dislocation

Answer 94

anterior dislocation

Question 95

which nerve can get strecthed and injured during dislocation

Answer 95

axillary nerve

Question 96

what is a bankart injury

Answer 96

front part of the capsule gets stretched out and torn around 3-6 oclck on right arm and 6-9 on left arm