Arm and Elbow Theory

Question 1

What joints make up the elbow joint

Answer 1

Humeroulnar

Humeroradial

Proximal radioulnar

Question 2

What joints act together as a pivot joint of the elbow/forearm

Answer 2

Humeroradial

Proximal & distal radioulnar

Question 3

When are the bones of the elbow joint most congruent

Answer 3

90 degrees flexion

Question 4

Define and explain the carrying angle

Answer 4

Lateral excursion of the forearm in extension

5-30 degrees

Caused by lateral part of trochlear and trochlear notch close together in extension

Question 5

Which joint of the elbow is incongruent

Answer 5

Humeroulnar

Question 6

What is the close-packed position of the elbow

Hint: when the joint capsule is tightest

Answer 6

In extension

Question 7

Where are the elbow “fat pads” located

Answer 7

Coranoid Fossa

Posterior distal humerus

(Both lie within the fibrous capsule)

Question 8

Ulna collateral ligament.

Anterior band is tight when?

Posterior band is tight when?

Answer 8

Anterior band is tight in extension

Posterior band is tight in flexion

Question 9

Role of the oblique band of the Ulnar collateral ligament

Answer 9

Deepens the coranoid fossa for humerus to fit

Question 10

Location of the 3 olecranon bursae

Answer 10

Subtendinous (most superior)

Intratendinous

Subcutaneous (most inferior)

Question 11

Define is students elbow

Answer 11

Bursitis of the subcutaneous olecranon bursa

Question 12

Type of joint and function of the interosseous membrane

Answer 12

Fibrous joint

Transmit force between radius and ulnar

Question 13

3 types of dislocation

Answer 13

Sub clinical subluxation

Subluxation

Dislocation