EXAM2_G15_Joints_IMAGING_1

Question 1

4 UE joints

Answer 1

SC, AC, GH, Scapulohumeral (needed for limb movement)

Question 2

Scapulohumeral rhythym

Answer 2

1:2 ration of scapula to GH movement
180 deg upper limb
60 deg scap rotation
120 deg humeral action at GH joint

Question 3

What is the sternal end of the clavicle?

Where does it attach?

Answer 3

small end goes to manubrium in the Clavicular notch

Question 4

What are the 4 ligaments of the sternoclavicular joint?

Answer 4

1. Interclavicular ligament
2. Costoclavicular ligament
3. Anterior sternoclavicular ligament
4. Posterior sternoclavicular ligament

Question 5

What is the disc between sternum and clavicle?

What is most important ligament of sternoclavicular joint?

Answer 5

Articular disc

costoclavicular ligament- anchors clavicle to the joint

Question 6

Dislocation of sternoclavicular joint

Answer 6

RARE (anterior more common 9:1)

Fracture more common

Question 7

What ligaments support the acromioclavicular ligament?

Answer 7

Medial is CONOID ligament
Middle is TRAPEZOID ligament
Lateral is CORACOACROMIAL ligament

Question 8

The trapezoid ligament and the conoid ligament are collectively called the?

Answer 8

Coracoclavicular ligaments

Question 9

What is continuous superiorly with the tendon of the long head of the biceps brachii?

Answer 9

GLENOID LABRUM

Question 10

What does the glenoid labrum do?

Where in the joint capsule is it located? where will it be pinned on a practical?

Answer 10

Fibrocartilage ring that deepens the glenoid cavity

-ring around the Glenoid cavity that forms the bowl

Question 11

What tendons are external to the joint capsule?

Answer 11

Supraspinatus subscapularis infraspinatus, teres minor

Question 12

GH joint capsule

Answer 12

has excess material inferior for upward rotations

loose fibrous capsule

Question 13

What forms the Protective arch superior to GH joint

what function?

Answer 13

Coracoacromial ligament:
Prevents superior displacement of head of humerus from GH cavity
Stabilizes acromioclavicular joint

Question 14

What maintains tendon of long head of biceps within intertubercular sulcus?

Answer 14

Transverse humeral ligament

Question 15

What reinforces the joint capsule superiorly

Answer 15

Coracohumeral ligament

Question 16

What ligament is internal to joint capsule? what are the three parts?
What does it do?

Answer 16

Glenohumeral ligaments
superior
middle 
inferior
Reinforces capsule anteriorly

Question 17

What synovial membrane of joint capsule protrudes through apertures in the fibrous joint capsule ?

Answer 17

Subtendinous Bursa of subscapularis

Question 18

what surrounds tendon of long head of biceps?

Answer 18

Synovial sheath of biceps brachii (can be seen on radio-graph)

Question 19

Waht are the two bursa under deltoid and coracoachromial ligament?

Answer 19

Subdeltoid bursa

subacromial bursa

Question 20

What is a shoulder separation?

what is type 1,2,3

Answer 20

Dislocation of the acromioclavicular joint
T1 /2 incomplete, primarily ac ligament involved (indirect force)

T3- Complete shoulder separation- AC joint and Coracoclavicular joints ruptured (Direct force)

T3+ complete shoulder separation involves rupture of ac and coracoclavicular ligament (direct force)

Question 21

Characteristics of a piano key sign

press down on clavicle and it comes back up like a piano key

Answer 21

dislocated AC joint
-traps pull clavicle up
UE and Scapula fall
-acromion moves inferior to clavicle
-prominent clavicle
-shoulder contour normal

Question 22

What is a Shoulder Dislocation?

Answer 22

dislocation of glenohumeral joint
Anterior SD most common

Axillary nerve and PCHA at risk in quad space.

INFERIOR most common probably weak cause they dont need to be strong b/c gravity helps

loss of shoulder contour

Question 23

What type of shoulder injury leads to a loss of shoulder contour? which one doesnt?

Answer 23

Dislocation of GH joint= loss of contour

Dislocation of AC joint- normal shoulder contour

Question 24

What most common dislocation 2nd most common of GH joint?

Answer 24

Subcoracoid

Subglenoid

Question 25

recurrent subcoracoid shoulder dislocations of GH joint shows what deformity?

Answer 25

Hill Sachs deformity

Divit (indented groove) in posterolateral aspect of humeral head

Question 26

Degenerative tendinitis of the rotator cuff and calcified tendinitis

What is the key clinical feature?

Answer 26

Subacromial bursitis
-focused on supraspinatus tendon near attachment on Greater tubercle
Avascular- age-related degeneration

Painful arc sign