2.3. The Elbow Joint

Question 1

What type of Joint is the Elbow Joint?

Answer 1

Synovial Hinge

Question 2

How many Separate Articulations are there in the Elbow Joint?

Answer 2

2

Question 3

What are the Separate Articulations in the Elbow Joint?

Answer 3

1. Trochlear Notch of the Ulnar and Trochlea of the Humerus

2. Head of the Radius and Capitulum of the Humerus

Question 4

What other Joint is found in the same Bursae as the Elbow Joint?

Answer 4

The Radioulnar Joint

Note - although this is in the same area, it is considered an entirely separate articulation

Question 5

What are Synovial Joints surrounded by?

Answer 5

A Fibrous Capsule, Enclosing the Joint

Question 6

What is the Benefit of the Fibrous Capsule?

Answer 6

It Strengthens the Joint

Question 7

1. How is the Elbow Joint Capsule described on the Anterior and Posterior Surfaces?
2. What is the function of this?

Answer 7

1. Loose

2. It allows for Movement

Question 8

What is a Bursae?

Answer 8

A Membranous Sac filled with Synovial Fluid

Question 9

What is the function of the Bursae?

Answer 9

It cushions the Moving Parts of a Joints, Preventing Degenerative Damage.

Question 10

How many Clinically Important Bursae are there in the Elbow?

Answer 10

3

Question 11

What are the Clinically Important Bursae in the Elbow?

Answer 11

1. Intratendinous
2. Subtendinous
3. Subcutaneous

Question 12

Where is the Intratendinous Bursa of the Elbow Joint located?

Answer 12

Within the Tendon of the Triceps Brachii

Question 13

Where is the Subtendinous Bursa of the Elbow Joint located?

Answer 13

Between the:

1. Olecranon
2. Tendon of the Triceps Brachii

Question 14

Where is the Subcutaneous Bursa of the Elbow Joint located?

Answer 14

Between the:

1. Olecranon
2. Overlying Connective Tissue

Question 15

What forms the Medial (Ulnar) Collateral Ligament of the Elbow?

Answer 15

A Thickening of the Medial Fibrous Joint Capsule

Question 16

Where does the Medial (Ulnar) Collateral Ligament:

1. Originate from?
2. Attach to?

Answer 16

1. Medial Epicondyle
2. a) Coronoid Process of the Ulna
3. b) Olecranon of the Ulna

Question 17

What forms the Lateral (Radial) Collateral Ligament of the Elbow?

Answer 17

A Thickening of the Lateral Fibrous Joint Capsule

Question 18

Where does the Lateral (Radial) Collateral Ligament:

1. Originate from?
2. Bend with?

Answer 18

1. Lateral Epicondyle

2. Annular Ligament of the Radius

Question 19

What is the function of the Collateral Ligaments?

Answer 19

Stabilizing the Flexion and Extension Movement of the Elbow

Question 20

Which Ligament holds the Head of the Radius?

Answer 20

Annular Ligament

Note - For more information on the Annular Ligament look up “2.5. The Radio-Ulnar Joint”

Question 21

What is the Arterial Supply to the Elbow Joint?

Answer 21

Cubital Anastomosis

Question 22

What is the Cubital Anastomosis formed of?

Answer 22

Recurrent and Collateral Branches from the Brachial and Deep Brachial Arteries

Question 23

What is the Nerve Supply to the Elbow Joint?

Answer 23

Anteriorly:
1. Median Nerve
2. Radial Nerve
3. Musculocutaneous Nerve
Posteriorly:
1. Ulnar Nerve

Question 24

What movement occurs at the Elbow Joint?

Answer 24

1. Flexion

2. Extension

Question 25

What muscles cause Flexion at the Elbow Joint?

Answer 25

Brachioradialis + Muscles of the Anterior Compartment of the Arm: 1. Biceps Brachii 2. Brachialis 3. Coracobrachialis

Question 26

What muscles cause Extension at the Elbow Joint?

Answer 26

Muscles of the Posterior Compartment of the Arm: 1. Triceps Brachii 2. Anconeus

Question 27

Do Pronation and Supination occur at the Elbow Joint?

Answer 27

No, they are produced at the nearby Radio-Ulnar Joint