Scapula Region and Shoulder Joint

Question 1

What are the bones of the Pectoral Girdle?

Answer 1

1. Clavicle
2. Scapula
3. Sternum
4. Humerus

Question 2

What joint is the shoulder joint?

Answer 2

The Glenohumeral Joint–> Synovial Joint

Question 3

What are the features of a Synovial Joint?

Answer 3

1. Capsule with a fibrous outer layer and inner synovial membrane
2. Hyaline Cartilage lining the bony articulating surfaces
3. Synovial Fluid
4. Ligaments to reinforce

Question 4

What feature of the Glenohumeral joint makes it more mobile than the hip joint?

Answer 4

The Glenoid fossa is shallow, allows for more rotation

Question 5

What are the ligaments of the Glenohumeral Joint?

Answer 5

1. Glenohumeral Ligaments
2. Coracohumeral Ligament
3. Transverse Humeral Ligament

Question 6

Describe the Glenohumeral Ligaments

Answer 6

3 bands: Superior, Middle and Inferior, Runs with the joint capsule from the Glenoid Fossa to the Anatomical Neck of the Humerus

Question 7

Describe the Coracohumeral Ligament

Answer 7

Attaches the base of the coracoid process to the Greater Tuberosity of the Humerus

Question 8

Describe the Transverse Humeral Ligament

Answer 8

Holds to tendon of the Long heads of Biceps in the Intertubercular Groove

Question 9

What is Bursae?

Answer 9

It is a fluid-filled pouch, lined by synovial membrane containing synovial fluid

Question 10

What is the function of Bursae?

Answer 10

Reduce friction between bones and soft tissue

Question 11

What are the Rotator Cuff Muscles?

Answer 11

1. Subscapularis
2. Supraspinatus
3. Infraspinatus
4. Teres Minor

Question 12

What are the attachments of the Rotator Cuff Muscles?

Answer 12

Greater Tuberosity–> Supraspinatus, Infraspinatus and Theres Minor
Lesser Tuberosity–> Subscapularis

Question 13

What are the origins of Subscapularis?

Answer 13

Subscapular Fossa

Question 14

What is the function of the Subscapularis?

Answer 14

Medially Rotate the arm

Question 15

What is the Nerve Supply of Subscapularis?

Answer 15

Upper and Lower Subscapular Nerves

Question 16

What are the origins of Supraspinatus?

Answer 16

Supraspinous Fossa

Question 17

What is the function of Supraspinatus?

Answer 17

Abducts the arm and assists the Deltoid Muscle

Question 18

What is the nerve supply of Supraspinatus?

Answer 18

Suprascapular Nerve

Question 19

What are the origins of Infraspinatus?

Answer 19

Infraspinous Fossa

Question 20

What is the function of Infraspinatous?

Answer 20

Lateral Rotation of the Arm

Question 21

What is the nerve supply of Infraspinatus?

Answer 21

Suprascapular Nerve

Question 22

What are the origins of Teres Minor?

Answer 22

Posterior Surface of Scapula

Question 23

What is the function of Teres Minor?

Answer 23

Lateral Rotation of the Arm

Question 24

What is the nerve supply of Trees Minor?

Answer 24

Axillary Nerve

Question 25

What are the origins of Teres Major?

Answer 25

Lower Lateral Part of the Scapula

Question 26

Where does Teres Major Attach?

Answer 26

Medial edge of the bicipital groove of the Humerus

Question 27

What is the function of Teres Major?

Answer 27

1. Adducts the Shoulder | 2. Medial Rotation of Arm

Question 28

What is the nerve supply of Teres Major?

Answer 28

1. Lower Subscapular Nerve

Question 29

What are the origins of Deltoid?

Answer 29

Clavicle and Scapula

Question 30

Where does Deltoid attach?

Answer 30

Deltoid tuberosity on the Humerus

Question 31

What is the function of the Deltoid?

Answer 31

1. Anterior Fibres--> Flex the Shoulder 2. Posterior Fibres--> Extend the Shoulder 3. Middle Fibres--> Abducts the Shoulder

Question 32

What muscles are involved in Elevation of the Scapula?

Answer 32

1. Superior Trapezius 2. Rhomboids 3. Levator Scapulae

Question 33

What muscles are involved in Depression of the Scapula?

Answer 33

1. Pectoralis Minor | 2. Serratus Anterior

Question 34

What muscles are involved in Protraction of the Scapula?

Answer 34

1. Pectoralis Minor | 2. Serratus Anterior

Question 35

What muscles are involved in Retraction of the Scapula?

Answer 35

1. Rhomboids 2. Latissimus Dorsi 3. Middle Trapezius

Question 36

What muscles are involved in Rotation of the Scapula?

Answer 36

1. Serratus Anterior 2. Superior Trapezius 3. Inferior Trapezius

Question 37

What muscles are involved in Medial Rotation of the Shoulder?

Answer 37

1. Subscapularis 2. Teres Major 3. Sternal Head of Pectoralis Major 4. Anterior Deltoid 5. Latissimus Dorsi

Question 38

What muscles are involved in Lateral Rotation of the Shoulder?

Answer 38

1. Infraspinatus 2. Teres Minor 3. Posterior Deltoid

Question 39

What muscles are involved in Flexion of the Shoulder?

Answer 39

1. Pectoralis Major 2. Anterior Deltoid 3. Biceps Brachii 4. Coracobrachialis

Question 40

What muscles are involved in Extension of the Shoulder?

Answer 40

1. Latissimus Dorsi 2. Posterior Deltoid 3. Teres Major 4. Triceps

Question 41

What muscles are involved in Adduction of the Shoulder?

Answer 41

1. Pectoralis Major 2. Latissimus Dorsi 3. Teres Major

Question 42

What muscles are involved in Abduction of the Shoulder?

Answer 42

1. Deltoid 2. Supraspinatus 3. Trapezius and Serratus Anterior 4. Infraspinatus 5. Teres Minor

Question 43

What is the blood supply to the shoulder?

Answer 43

1. Anterior and Posterior Circumflex Humeral Arteries 2. Axillary Artery 3. Brachial Artery

Question 44

Where is the Circulatory Anastomosis of the Scapula?

Answer 44

Between the 1st part of the Subclavian artery and the 3rd part of the Axillary Artery