Arthrology: Elbow

Question 1

What does the elbow joint consist of?

Answer 1

Humeroulnar and humeralradial articulations

Question 2

At the humeroulnar articulation, what is articulating?

Answer 2

Anteriorly: Trochlea of humerus articulates with trochlear notch of the ulna
Posteriorly: Olecranon of the ulna with the olecranon fossa

Question 3

What does the olecranon fully articulate with the olecranon fossa?

Answer 3

In full extension

Question 4

At the humeroradial articulation, what is articulating?

Answer 4

The capitulum articulates with the head of the radius

Question 5

What kind of joint is the elbow?

Answer 5

Synovial, Hinge

Very stable! Whoo!

Question 6

Available movements

Answer 6

Flexion

Extension (closed pack position)

Question 7

Ligaments of the elbow

Answer 7

1. Lateral (radial) Collateral Ligament

2. Medial (ulnar) Collateral Ligament

Question 8

Where does the lateral collateral ligament attach?

Answer 8

Lateral epicondyle – annular ligament of the radius

Question 9

Where does the medial collateral ligament attach?

Answer 9

Medial epicondyle – coronoid process, olecranon process

Question 10

Where is the olecranon bursa? + A.k.a

Answer 10

Between the olecranon and the overlying skin

“Student’s Elbow”

Question 11

At the Proximal Radioulnar Joint, what is articulating. What type of joint is it?

Answer 11

Head of the radius with the radial notch of the ulna

Synovial, Pivot

Question 12

What does the radioulnar joint allow for?

Answer 12

Movement of the head of the radius against the ulna

Question 13

How does the head of the radius rotate?

Answer 13

Within the ring formed by the annular ligament

Question 14

Used to describe the rotational movements of the forearm

Answer 14

Pronation/Supination

Question 15

Palm faces down

Answer 15

Pronation

Question 16

Palm faces up

Answer 16

Supination

Question 17

Describe the annular ligament

Answer 17

• U-shaped
• Runs from the anterior surface of the radial notch around the head of the radius to the posterior surface of the radial notch.
• Holds radial head in place

Question 18

What saying is involved with the annular ligament

Answer 18

“Slipped Elbow”

Question 19

Distal Radioulnar Joint articulations and type of joint

Answer 19

The head of the ulna articulates with the ulnar notch of the radius.
Synovial, pivot

Question 20

What does the Distal Radioulnar Joint allow for?

Answer 20

Allows for movement of the radius around a relatively fixed ulna

Question 21

Available movements of the Distal Radioulnar Joint

Answer 21

Pronation/Supination

Question 22

What binds the radius and ulna together?

Answer 22

An articular disc

Question 23

What does the articulating disc do at the distal radius and ulna?

Answer 23

Separates the distal radioulnar joint and the wrist joint cavities. Ulna does not directly articulate with the carpal bones

Question 24

What ligament is involved with the distal radioulnar joint? What does it attach?

Answer 24

Palmar and Dorsal radioulnar ligaments

Distal Ulnar–Distal Radius (dorsal and palmar surfaces)

Question 25

What helps to stabilize the radius and ulna and the proximal and distal joints?

Answer 25

An interosseous membrane