UL Concept D

Question 1

What are the 3 articulations of the shoulder area?

Answer 1

Sternoclavicular
Scapuloclavicular (acromioclavicular)
Glenohumeral

Question 2

What are the 3 articulations of the elbow and forearm area?

Answer 2

Humeroulnar
Humeroradial
Radioulnar (proximal)

Question 3

What are the 2 articulations of the wrist area?

Answer 3

Radiocarpal

Radioulnar (distal)

Question 4

Attributes of sternoclavicular joint are…

Answer 4

Extremely strong

Remains mobile

Question 5

Is scapuloclavicular joint weak or strong?

Answer 5

Weak

Question 6

What reinforces scapuloclavicular joint?

Answer 6

Trapezius muscle fibers

More importantly, the coracoclavicular ligament

Question 7

Attribute of coracoclavicular ligament is…

Answer 7

It’s the main stabiliser backed with clavicle and scapula.

Question 8

Function of coracoacromial arch/ligament is…

Answer 8

Prevent superior dislocation of head of humerus.

Question 9

What articulates for glenohumeral ligament?

Answer 9

Glenoid cavity of scapula and head of humerus.

Question 10

What is the structure that surrounds the glenoid cavity to create a bit if a deeper socket?

Answer 10

Glenoid labrum

Question 11

What are the ligaments that attaches the actual shoulder joint called?

Answer 11

Glenohumeral ligaments

Question 12

Where do glenohumeral ligaments attach from/to?

Answer 12

Margin of glenoid cavity and labrum to anatomical neck of humerus

Question 13

Shoulder joint loose or strong?

Answer 13

Loose

Question 14

Why is the shoulder joint weak inferiorly?

Answer 14

No rotator cuff
Laced when arm is adducted
Prone to dislocation

Question 15

The glenohumeral joint capsule is lined by…

Answer 15

Synovial membrane

Question 16

The articular surface of glenohumeral joint is…

Answer 16

Hyaline cartilage

Question 17

What are some muscle actions at the shoulder?

Answer 17

Abduction
Flexors
Extensors

Question 18

Which muscle initiates abduction? Which muscle is the primary abductor?

Answer 18

Supraspinatus

Deltoid

Question 19

Is the fibrous elbow capsule weak?

Answer 19

Yes

Question 20

What strengthens elbow fibrous capsule?

Answer 20

Lateral and medial collateral ligaments.

Question 21

What are the 2 articulations at the elbow?

Answer 21

Humeroulnar

Humeroradial

Question 22

What are the articulations of humeroulnar?

Answer 22

Trochlea of ulna

Trochlear notch of humerus

Question 23

What are the articulations of humeroradial joint?

Answer 23

Capitulum of humerus and head of radius

Question 24

What is humeroradial joint reinforced by?

Answer 24

Anular ligament

Question 25

What ligament helps with pronation and supination?

Answer 25

Anular ligament

Question 26

For the ulnahumeral joint, which flexors cross Anteriorly?

Answer 26

Brachialis Biceps brachii Brachiradialis

Question 27

For the ulnahumeral joint, which extensors cross posteriorly?

Answer 27

Triceps brachii

Question 28

Brachialis flexes (anteriorly to ulnahumeral joint)...

Answer 28

In all positions

Question 29

Biceps brachii flexes (anteriorly to ulnahumeral joint)...

Answer 29

Supinated

Question 30

Brachioradialis flexes (anteriorly to ulnahumeral joint)...

Answer 30

Mid-pronated

Question 31

What actions are permitted with radiohumeral joint?

Answer 31

Flexion/extension | Pronation/supination

Question 32

What muscle causes pronation at radiohumeral | Joint?

Answer 32

Pronator teres

Question 33

What muscle causes supination at radiohumeral | Joint?

Answer 33

Biceps brachii

Question 34

What are the 3 joints of the forearm?

Answer 34

Proximal Distal Interosseous membrane

Question 35

What action does Proximal joint, Distal joint, and | Interosseous membrane at forearm support?

Answer 35

Pronation and supination

Question 36

What bones participate in radiocarpal joint?

Answer 36

Scaphoid Lunate Triquetreum & Radius

Question 37

What bone doesn't participate in radiocarpal joint?

Answer 37

Ulna

Question 38

What is ulna and radiocarpal joint excluded by?

Answer 38

Fibrocartilaginous disc

Question 39

What are the supporting ligaments of radiocarpal joint?

Answer 39

Radial collateral | Ulnar collateral

Question 40

What does radial collateral do?

Answer 40

Limits adduction

Question 41

What does ulnar collateral do?

Answer 41

Limits abduction

Question 42

What action does radiocarpal joint permit?

Answer 42

Flexion/ extension Adduction Abduction

Question 43

What causes flexion of radiocarpal joint?

Answer 43

Flexors (carpi's, of digits) | Palmaris longus

Question 44

What causes extension of radiocarpal joint?

Answer 44

Extensors (carpi's, of digits)

Question 45

What causes adduction of radiocarpal joint?

Answer 45

Extensor and flexor carpi ulnaris

Question 46

What causes abduction(to undo adduction) of radiocarpal joint?

Answer 46

Extensor and flexor carpi radialis