Lecture 5: Bones And Joints Of The Shoulder Girdle MS100

Question 1

Joints of the shoulder girdle

Answer 1

1. GH joint
2. AC joint
3. SC joint
4. Scapulothoracic joint

Question 2

Ligaments of the GH joint and what they limit

Answer 2

1. GH ligaments - limits horizontal abduction and lateral rotation
2. Coracohumeral ligament - limits lateral rotation and support arm against gravity
3. Coracoacromial ligament - limits superior displacement of the humerus
4. Transverse humeral ligament - limits lateral displacement of the tendon of the long head of the biceps
5. Capsule

Question 3

Ligaments of the AC joints and what they limit

Answer 3

1. Capsule
2. AC ligament
   Limits overriding of the bones
3. Coracoclavicular ligaments
   Limits post and sup clavicular displacement, controls scapular rotation
4. Superior transverse scapular ligament

Question 4

Ligaments of the SC joint and what they limit?

Answer 4

1. Capsule
2. SC ligaments
   Limits anterior and posterior displacement of the clavicle
3. Costoclavicular ligament
   Limits elevation, protraction and retraction of the clavicle; limits shoulder girdle motion
4. Interclavicular ligament
   Limits sup-inf clavicular displacement

Question 5

Bony landmarks of the clavicle

Answer 5

Impression for the costoclavicular ligament
Groove for subclavius muscle
Tubercle for conoid ligament
Line for Trapzoid ligament

Question 6

Scapula tubercles and their attachments

Answer 6

Supraglenoid tubercle - long head of biceps brachii
Infraglenoid tubercle - long head of tricep

Question 7

Borders of the scapula and the attachments

Answer 7

Medial border - distal attachment of rhomboids
Lateral border - proximal attachment of the teres minor

Question 8

What implants on tubercles of humerus

Answer 8

Greater - insertion of supra- and infraspinous muscle and teres minor
Lesser - insertion of subscapularis

Question 9

Condyles of the humerus

Answer 9

Trochlea - proximal ulna
Capitulum - proximal radius

Question 10

Fossae of humerus

Answer 10

Anterior:
Radial - for radius
Coronoid - for ulna

Posterior:
Olecranon - ulna olecranon

Question 11

Which tendons blends with GH capsule?

Answer 11

Supraspinatus
Infraspinatus
Teres Minor
Subscapularis

Question 12

How many bands does GH ligament have

Answer 12

3 - sup, med, inf

Question 13

How many bands does Coracohumeral joint have?

Answer 13

2 - sup, inferior

Question 14

Name bursae of GH joint

Answer 14

Subdeltoid
Subacromial
Subscapular

Question 15

Location of subdeltoid bursae

Answer 15

Between deltoid and acromion - and proximal humerus.

Question 16

Location of the subacromial bursae

Answer 16

Coracoacromial ligament and acromion - and supraspinatus tendon

Question 17

Location of subscapular bursae

Answer 17

Anterior and deep to subscapularis tendon

Question 18

Movement of the AC joint

Answer 18

Sup/inf rotation of scapula
Protraction / retraction of scapula
Upward tilt of the scapula

Question 19

FOOSH
How does Coracoclavicular ligament help

Answer 19

Fall on outstretched hand
Force to GH joint - scapula - SC

Question 20

Movements of SC joint

Answer 20

Clavicular elevation-depression
Clavicular protraction - retraction
Clavicular rotation

Question 21

What are the functions of the disc of the SC joint?

Answer 21

Some motion of the sc joint and shock absorption

Question 22

Classification of the SC joint

Answer 22

Biaxial, saddle, synovial

Question 23

AC joint classification

Answer 23

Non axial, plane, synovial

Question 24

What joints has a vestigial remnant?

Answer 24

AC joint - Fibricartilagenous disc