Shoulder - Joints & Ligaments

Question 1

Sternoclavicular joint type

Answer 1

Diarthorodial (synovial)

Saddle shape

Question 2

Sternoclavicular joint ligaments

Answer 2

Interclavicular lig
Ant and post SC ligs
Costoclavicular lig

Question 3

Acromioclavicular joint type

Answer 3

Diarthorodial (synovial)

Question 4

Acromioclavicular joint ligaments

Answer 4

Sup and inf AC ligs

EXTRAARTICULAR – Coracoclavicular ligs (conoid and trapezoid)

Question 5

Glenohumeral joint capsule ligaments

Answer 5

Glenohumeral ligs (sup, middle inf) – inferior GH lig is split into [ant, post and axillary pouch]

EXTRAARTICULAR – Coracohumeral lig

Question 6

Glenohumeral joint capsule origin and insertion

Answer 6

Origin: glenoid rim

Insertion: anatomic neck of humerus

Question 7

Superior glenohumeral ligament actions

Answer 7

primary restraint to ER in adducted or slightly abducted position

primary restraint to inferior translation

secondary restraint to posterior translation

Question 8

Superior glenohumeral ligament origin and insertion

Answer 8

Origin: upper pole of glenoid and base of coracoid

Insertion: superior to lesser tuberosity

Question 9

Middle glenohumeral ligament action

Answer 9

prevents ant translation at 45° abduction

secondary restraint of ER at 90° abduction

Question 10

Inferior glenohumeral ligament action

Answer 10

primary restraint to abduction at 90° (anterior band)

primary restraint to IR (posterior band)

Question 11

Inferior GH lig origin and insertion

Answer 11

Origin: glenoid inf to MGHL

Insertion: inferior aspect of anatomic neck

Question 12

Coracohumeral lig action

Answer 12

primary restraint to inf translation in adducted position

Question 13

Coracohumeral lig origin and insertion

Answer 13

O: base of coracoid process

I: sup to greater tuberosity with attachment to capsule

Question 14

Coracoacromial lig action

Answer 14

limit superior humeral translation

*important with impingement syndrome

Question 15

Coracoacromial lig origin and insertion

Answer 15

O: sup lat coracoid process

I: acromion, anterior to ACJ

Question 16

stability of the shoulder joint relies primarily on

Answer 16

static and dynamic structures

Question 17

scapulohumeral rhythm

Answer 17

2:1

Question 18

ligaments, joint capsule, labrum

static or dynamic

Answer 18

static

Question 19

skeletal mm

static or dynamic

Answer 19

dynamic

Question 20

the shoulder complex consists of 4 joints

Answer 20

glenohumeral
sternoclavicular
acromioclavicular
scapula-thoracic articulation

Question 21

the shoulder complex is made up of what 4 bones

Answer 21

sternum
clavicle
scapula
humerus

Question 22

Acts as a “strut” holding the GHJ away from the body to allow full ROM

Answer 22

Clavicle

Question 23

Only direct joint connection of the upper extremity to the trunk

Answer 23

sternoclavicular joint

Question 24

Strongest portion of the sternoclavicular ligament

Answer 24

posterior

Question 25

Prevents superior, anterior & posterior displacement

Answer 25

sternoclavicular ligament

Question 26

Strengthens the shoulder capsule superiorly; limits superior displacement

Answer 26

Interclavicular ligament

Question 27

Helps increase stability & shock absorption

Answer 27

articular disc of acromioclavicular joint

Question 28

Static stabilizers of glenohumeral joint (4)

Answer 28

1. Glenoid labrum
2. Joint capsule
3. Glenohumeral ligaments
4. Coracohumeral ligament

Question 29

Origin: glenoid inferior to SHGL
Insertion: anterior aspect of anatomic neck of humerus

Answer 29

middle glenohumeral ligament

Question 30

“roof” of the shoulder joint

Answer 30

coracoacromial ligament

Question 31

Sternoclavicular joint is reinforced by what 2 ligaments

Answer 31

1. Costoclavicular lig
2. Interclavicular lig

Question 32

Function of SCJ

Answer 32

• increases stability
• provides shock absorption

Question 33

• anchors inferior surface of sternal end of the clavicle to first rib
• opposes pull of SCM

Answer 33

Costoclavicular ligament

Question 34

Anterior & posterior SC ligament is reinforced with the

Answer 34

SCM tendon

Question 35

ACJ has major stability from ____ and ____ AC ligaments
Reinforced by the attachment ____ and ____ muscles

Answer 35

Superior and inferior AC ligaments

Deltoid and trapezius muscles

Question 36

• important in stability and motion
• anchor the clavicle to the coracoid process

Answer 36

Coracoclavicular ligaments

Question 37

What ligament counteracts the pull of the pectoralis minor and coracobrachialis

Answer 37

Coracoacromial ligament