Shoulder joint Flashcards Preview

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Flashcards in Shoulder joint Deck (25):
1

What are the articular surfaces covered with

Hyaline cartilage

2

What deepens the glenoid fossa

Glenoid labrum

3

What increases stability of shoulder joint

Rotator cuff muscles,
deltoid,
long head of biceps brachii,
long head of triceps brachii,
Ligaments,
Joint capsule

4

Where is the subacromial bursa

Inferior to deltoid and acromion
Superior to supraspinatus tendon and joint capsule

5

What movements does subacromial bursa facilitate

Supraspinatus tendon under coracoacromial arch,
Deltoid muscle over capsule and greater tubercle of humerus

6

Where is the subscapular bursa

Between subscapularis tendon and scapula

7

What movement does the subscapular bursa facilitate

Subscapularis tendon over scapula

8

Where is the coracoacromial ligament

Between acromion and coracoid process

9

Where is coracohumeral ligament

Attaches base of coracoid process to greater tubercle

10

Where is transverse humeral ligament

Attaches the tubercles of humerus
It holds the long head biceps tendon in Intertubercular groove during shoulder movement

11

Where are the superior, middle and inferior glenohumeral ligaments

Between glenoid labrum and humerus

12

What makes the coracoacromial arch

Coracoacromial ligament, acromion and coracoid process

13

What does the CAA prevent

Superior displacement of humeral head

14

Articulating surfaces at shoulder joint

Glenoid cavity of scapula
Head of humerus

15

How big is the gap between acromion and humerus head

1-1.5cm

16

What is in the gap between acromion and humerus head

Subacromial bursa,
rotator cuff tendons,
capsule,
long head tendon of biceps

17

Arterial supply

Anterior and posterior circumflex humeral arteries,
Suprascapular artery

18

Nervous supply

Axillary, Suprascapular and lateral pectoral nerves
Roots C5+ C6

19

When are the axilllary nerve and posterior circumflex humeral artery vulnerable

Intramuscular injection into deltoid,
Surgical neck fracture,
Shoulder dislocation

20

What occurs in painful arc syndrome

Inflammation of supraspinatus tendon/ subacromial bursa causes the supraspinatus tendon to rub under the CAA during abduction

21

Predisposing factors for painful arc syndrome

Old age, certain anatomical differences, repetitive overuse, avascularity of supraspinatus tendon

22

How are shoulder dislocations named

By position of humeral head in relation to infraglenoid tubercle

23

How are anterior dislocations usually caused

Excessive extension and lateral rotation of humerus at shoulder

24

What is associated with increased risk of future dislocations

Tearing of joint capsule and/or rotator cuff tendons

25

What nerves can be damaged by shoulder dislocations

Most likely Axillary nerve
Can stretch radial nerve

Decks in MSK Class (87):