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Flashcards in MSK Deck (174)
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1

What are the articulating surfaces of the shoulder joint?

glenoid fossa
head of the humerus

2

What acts to increase the joint surface area>

glenoid labrum
fibrocartilage rim

3

where does the glenohumeral joint capsule extend from

from the anatomical neck of the humerus to the border of the glenoid fossa

4

name the synovial bursae of the shoulder

subacromial
subscapular
subcoracoid

5

Where is the subacromial bursa found?

inferiorly to the deltoid and acromion,
superiorly to the supraspinatus tendon and the joint capsule.

6

Where is the subscapular bursa found?

Located between the subscapularis tendon and the scapula.

7

What is the purpose of the coracoacromial ligament of the shoulder

prevents superior displacement of humerus

8

What is the purpose of the coracohumeral ligament of the shoulder

supports joint superiorly

9

What is the purpose of the glenohumeral ligament of the shoulder

stabilises joint anteriorly

10

What is painful arc syndrome?

inflammation of supraspinatus tendon and subacromial bursa beneath coracoacromial tendon

11

What gives the shoulder joint mobility

ball and socket
lax joint capsule
shallow glenoid cavity, large head of humerus

12

What gives the shoulder joint stability

ligaments - reinforce joint capsule
glenoid labrum - increases surface area
rotator cuff muscles - pull humeral head into glenoid cavity

13

What is the most common dislocation of the shoulder

anterior

14

What causes anterior dislocation of the shoulder

extension
external rotation

15

name the rotator cuff muscles

supraspinatus
infraspinatus
teres minor
subscapularis

16

What is the function of the rotator cuff muscles as a group?

pull humeral head into the glenoid cavity

17

name the origin and insertion of the supraspinatus

supraspinous fossa
greater tubercle of humerus

18

name the origin and insertion of the infraspinatus

infraspinous fossa
greater tubercle of humerus

19

name the origin and insertion of the teres minor

lateral posterior surface of scapula
greater tubercle of humerus

20

name the origin and insertion of the subscapularis

subscapular fossa
lesser tubercle of the humerus

21

Which rotator cuff muscles are innervated by the suprascapular nerve

supraspinatus
infraspinatus

22

Which rotator cuff muscles are innervated by the upper and lower subscapular nerves

subscapularis

23

Which rotator cuff muscles are innervated by the axillary nerve

teres minor

24

Which rotator cuff muscles act to laterally rotate the arm

teres minor
infraspinatus

25

Which rotator cuff muscles act to medially rotate the arm

subscapularis

26

Which rotator cuff muscles act to abduct the arm

supraspinatus

27

State the boundaries of the cubital fossa

medial = pronator teres
lateral = brachioradialis
superior = line between epicondyles of humerus

28

what are the contents of the cubital fossa

biceps tendon
brachial artery
median nerve

29

What makes up the floor of the cubital fossa

brachialis
supinator

30

What can a supracondylar fracture of the humerus lead to?

damage to the brachial artery
Volkmann's contracture