The Elbow Flashcards Preview

631: Clinical Management of the Musculoskeletal System I > The Elbow > Flashcards

Flashcards in The Elbow Deck (38):
1

What are the 3 functions of the elbow?

- Enables proper positioning of the hand
- Allows transmission of power from the shoulder to the hand
- Augmenting the versatility and agility of the UE

2

What are the 3 joints of the elbow?

- Humeroulnar joint
- Humeroradial joint
- Proximal radioulnar joint

3

What is the capsular pattern for the humeroulnar joint?

Flexion > Extension

4

What is the resting position for the humeroulnar joint?

70 degrees of elbow flexion and 10 degrees of supination

5

What is the closed packed position for the humeroulnar joint?

Extension and supination

6

What is the humeroradial joint aka?

Radiocapitellar joint

7

What is the capsular pattern for the humeroradial joint?

Flexion > Extension

8

What is the resting position for the humeroradial joint?

Full extension and full supination

9

What is the closed packed position for the humeroradial joint?

Elbow flexed to 90 degrees and the forearm supinated to 5 degrees

10

What is it called when the radial head becomes dislocated?

Nursemaid's elbow

11

What is the capsular pattern for the proximal radioulnar joint?

Equal limitation of supination and pronation

12

What is the resting position for the radioulnar joint?

35 degrees of supination and 70 degrees of elbow flexion

13

What is the closed packed position for the radioulnar joint?

5 degrees supination

14

What are the functions of the Medial Collateral (Ulnar) Ligament?

Supports the medial humeroulnar joint and form a tunnel with the FCU for the ulnar nerve

15

What are the functions of the Lateral Collateral (radial) Ligament?

- to maintain the humeroulnar and humeroradial joints when the elbow is loaded in supination
- stabilize the proximal radioulnar joint during full supination and pronation

16

What is the function of the annular ligament?

Checks displacement of the radial head

17

What forms the floor of the cubital tunnel?

medial collateral ligament

18

What forms the roof of the cubital tunnel?

aponeurosis, arcute ligament

19

What forms the anterior aspect of the cubital tunnel?

medial epicondyle

20

What forms the posterior aspect of the cubital tunnel?

medial head of the triceps

21

What forms the lateral aspect of the cubital tunnel?

olecranon

22

What travels through the cubital tunnel?

the ulnar nerve

23

When is the volume of the cubital tunnel the greatest?

when the elbow is in extension

24

Moving the elbow into full flexion decreases the size of the cubital tunnel volume by __%

55%

25

What is considered the entryway to the forearm?

The cubital fossa

26

What forms the lateral boundary of the cubital fossa?

Brachioradialis and ECRL muscles

27

What forms the medial boundary of the cubital fossa?

Pronator Teres muscle

28

What forms the proximal boundary of the cubital fossa?

imaginary line that passes through the humeral condyles

29

What forms the floor of the cubital fossa?

Brachialis muscle

30

What are the contents of the cubital fossa?

- Tendon of biceps brachii
- Median nerve
- Brachial artery
- Radial nerve
- Median cubital or intermediate cubital cutaneous vein

31

Describe the concept of force couples of the elbow

In order for a movement to occur, muscles must balance each other out. For example, the triceps and biceps need to be balanced during elbow flexion/extension

32

Male carrying angle = _-_ degrees
Feale carrying angle = _-_ degrees

5-10

10-15

33

A carrying angle greater than 15 degrees is considered cubitis ___.
A carrying angle less than 5 degrees is considered cubitis ___.

valgus

varus

34

What is gunstock deformity?

an increase in cubital varus

35

If swelling occurs what position will the patient hold the hold in?

In the resting position, which is also position of maximum volume

36

The medial collateral ligament is placed on stretch by introducing a ____ force

valgus

37

The lateral collateral ligament is placed on stretch by introducing a ____ force

varus

38

Reflexes:
Biceps = __
Brachioradialis = __
Triceps = __

C5
C6
C7