Glenohumeral joint

Question 1

Damage to the axillary nerve can cause what?

Answer 1

Deltoid dystrophy, and regimental badge anaesthesia

Question 2

Describe the stability of the glenohumeral joint

Answer 2

The synovial surfaces are incongruent and the joint capsule is lax

Question 3

Which factors improve the stability of the glenohumeral joint?

Answer 3

glenoid labrum, biceps tendon, rotator cuff,

Question 4

Where is the glenohumeral joint weakest/

Answer 4

Inferiorly

Question 5

What does the coracoacromial arch prevent?

Answer 5

Superior displacement

Question 6

Dislocation of the glenohumeral joint often occurs?

Answer 6

anteroinferiorly

Question 7

What is painful arc syndrome?

Answer 7

Inflammation of the bursa (subacromial) Painduring 50-130 of abduction (bursa in contact with the acromion)

Question 8

Posterior fibres of deltoid originate where?

Answer 8

Inferior edge of crest of scapula

Question 9

Middle fibres of deltoid originate where?

Answer 9

Lateral margin of acromion

Question 10

Anterior fibres of deltoid originate where?

Answer 10

Anterior border of 1/3 lateral clavicle

Question 11

Insertion of deltoid?

Answer 11

Deltoid tuberosity

Question 12

Action of deltoid?

Answer 12

Major abductor of the arm after 15degrees

Question 13

Origin of supraspinatus?

Answer 13

Supraspinous fossa of the scapula

Question 14

Insertion of supraspinatous?

Answer 14

Greater tubercle of humerus

Question 15

Action of infraspinatus?

Answer 15

Initiates abduction initial 15degrees

Question 16

What is the most common muscle to be ruptured?

Answer 16

Supraspinatous

Question 17

Origin of infraspinatus?

Answer 17

medial 2/3 of Infraspinous fossa

Question 18

Insertion of infraspinatus?

Answer 18

Greater tubercle of humerus

Question 19

What is the action of infraspinatus?

Answer 19

Lateral rotation of humerus

Question 20

Test for infraspinatus?

Answer 20

Laterally rotate arm against resistance (whilst flexed)

Question 21

Origin of teres minor?

Answer 21

immediately adjacent to the lateral border of scapula

Question 22

Insertion of teres minor?

Answer 22

Greater tubercle of humerus

Question 23

Action of teres minor?

Answer 23

Lateral rotation of humerus

Question 24

Origin of subscapularis?

Answer 24

Medial 2/3 of subscapular fossa

Question 25

Insertion of subscapularis?

Answer 25

Lesser tubercle of humerus

Question 26

Action of subscapularis?

Answer 26

Medial rotation of arm

Question 27

Teres major origin?

Answer 27

Inferior angle of the scapula

Question 28

Insertion of teres major?

Answer 28

medial lip of intertubercular sulcus of humerus

Question 29

Action of teres minor?

Answer 29

medial rotation and adduction

Question 30

Inferior boundary of quadrangular space?

Answer 30

Teres Major

Question 31

Superior boundary of quadrangular space?

Answer 31

Teres Minor

Question 32

Lateral boundary of quadrangular space?

Answer 32

Surgical neck of humerus

Question 33

Medial boundary of quadrangular space?

Answer 33

Long head of triceps

Question 34

What are the contents of the quadrangular space?

Answer 34

Axillary nerve and posterior circumflex artery and vein

Question 35

What is quadrangular space syndrome and caused by what?

Answer 35

Periodic blockage of posterior circumflex, shoulder pain and lateral numbness, associated with fibrous bands in space