Elbow Articulations

Question 1

What makes up the Radiohumeral joint of the elbow?

Answer 1

Ball and socket capitulum (convex surface)

Head of the radius (concave)

Question 2

What is the osteokinematic motion of the radiohumeral joint?

Answer 2

Flexion/Extension

Pronation/Supination

Question 3

What is the loose packed position of the radiohumeral joint?

Answer 3

Full extension, supination

Question 4

Closed packed position of the radiohumeral joint?

Answer 4

90 degrees flexion, 5 degrees supination

Question 5

Capsular Pattern of the Radiohumeral Joint?

Answer 5

Flexion > Extension> Supination > Pronation

Question 6

What is the ulnohumeral joint formed by?

Answer 6

Hourglass-shaped trochlea of the humerus

Trochlear notch of the ulna

Question 7

Osteokinematic motion of Ulnohumeral joint?

Answer 7

Flexion/Extension

Question 8

Loose packed position of the ulnohumeral joint?

Answer 8

70 degrees elbow flexion, 10 degrees supination

Question 9

Closed packed position of the ulnohumeral joint?

Answer 9

Extension

Question 10

Capsular Pattern of the ulnohumeral joint?

Answer 10

Flexion > Extension

Question 11

Proximal Radioulnar Joint is composed of?

Answer 11

Radial notch of the ulna(concave)

Rim of the Radial head (convex)

Question 12

Osteokinematic motion of the Proximal radioulnar joint?

Answer 12

Pronation/supination

Question 13

Loose packed position of the proximal radioulnar joint?

Answer 13

70 degrees elbow flexion, 35 degrees supination

Question 14

Closed packed position of the proximal radioulnar joint?

Answer 14

5 degrees supination

Question 15

Capsular pattern of the Proximal radioulnar joint?

Answer 15

Supination > pronation

Question 16

What does the annular ligament surround?

Answer 16

The head of the radius

Question 17

What is the purpose of the annular ligament?

Answer 17

It allows the head of the radius to rotate and retain contact wit the radial notch of the ulna

Question 18

Where does the anterior ligament of the elbow attach?

Answer 18

Stretches from the radial collateral ligament and attaches above the upper edge of the Coronado fossa, extending just below the coronoid process

Question 19

Where is the cubical fossa located?

Answer 19

Triangular space located at the anterior elbow

Question 20

What is the cubical fossa bordered by?

Answer 20

1. Brachioradialis
2. Pronator teres
3. Brachialis
4. Horizontal line passing through the humeral epicondyles

Question 21

What does the cubital fossa contain?

Answer 21

1. Biceps Brachii tendon
2. Median nerve
3. Radial nerve
4. Brachial artery
5. Median cubital vein

Question 22

What is the cubital tunnel?

Answer 22

Space formed by the:

1. ulnar collateral ligament
2. Flexor Capri ulnaris
3. Medial head of the triceps
4. Medial epicondyle

Question 23

What nerve runs through the cubital tunnel?

Answer 23

The ulnar nerve

Question 24

When does the cubital tunnel become the smallest?

Answer 24

When the elbow is in full flexion

Question 25

Where is the olecranon bursa located?

Answer 25

Lies posterior to the olecranon process and is considered the main bursa in the elbow

Question 26

When does the olecranon typically become inflamed?

Answer 26

With direct trauma to the elbow due to its superficial position

Question 27

Where is the posterior ligament of the elbow located?

Answer 27

Blends on each side with the collateral ligaments and is attached to the upper position of the olecranon fossa, just below the olecranon process

Question 28

Where is the radial collateral ligament (lateral collateral ligament) located?

Answer 28

Extends from the lateral epicondyle of the humerus to the lateral border and olecranon process of the ulna and to the annular ligament

Question 29

What is the purpose of the RCL (LCL) ligament?

Answer 29

It is fan-shaped and prevents adduction of the elbow joint + provides reinforcement of the radiohumeral articulation

Question 30

Where is the Ulnar Collateral Ligament (Medial collateral ligament) located?

Answer 30

Runs from the medial epicondyle of the humerus to the Proximal portion of the ulna

Question 31

What is the purpose of the UCL (MCL)?

Answer 31

Prevents excessive abduction of the elbow joint

Question 32

What athlete is most likely to present with an injury to the LCL and MCL of the elbow?

Answer 32

Baseball players—ligaments become frayed or torn through the stress of repetitive throwing motions FOOSH can also rupture collateral ligaments which is often associated with elbow dislocation