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Flashcards in Upper Quarter 1 Deck (66)
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What are the joints of the elbow and forearm?

Humeroulnar
Humeroradial
Proximal radioulnar
Distal radioulnar

1

What is the classification of the humeroulner and humeroradial joints

Diarthrodial uniaxial hinge joint

2

What are the osseous structures of the humerus?

Supracondylar ridge
Epicondyles
Olecranon fossa
Trochlea
Trochlear groove
Capitulum

3

What are the osseous structures of the ulna?

Olecranon process
Trochlear notch
Trochlear ridge
Coronoid process

4

What are the ligamentous structures of the elbow joint?

Medial (ulnar) collateral ligament
Lateral (radial) collateral ligament

5

What does the medial collateral ligament of the elbow do?

Resists valgus stress

6

What does the lateral collateral ligament of the elbow do?

Resists varus stress

7

What are the three prime flexors of the elbow?

Biceps Brachii
Brachialis
Brachioradialis

8

What are the two prime extensors of the elbow?

Triceps
Anconeus

9

What are the motions of the humeroradial and humeroulnar joint?

Flexion
Extension
In Sagittal plane and coronal or M/L axis

10

Does active or passive ROM allow for more movement?

Passive, due to the bulk of the muscle not contracting.

11

Which position of the hand allows for greater flexion: supination, pronation, neutral?

Supination

12

For elbow flexion and extension, is it concave on convex or convex on concave?

Concave on convex

13

How do you classify the proximal and distal radioulnar joints?

Diarthrodial uniaxial pivot joints

14

What are the osseous structures of the radius?

Radial head
Ulnar notch

15

What are the osseous structures of the ulna

Radial notch
Ulnar head

16

What are the ligamentous structures of the forearm?

Annular ligament
Quadrate ligament
Interosseous membrane
Oblique cord

17

What does the annular ligament do?

Maintains radial head in radial notch

18

What does the quadrate ligament do?

Maintains radial head in radial notch
Limits spin of radial head in supination/pronation

19

What does the interosseous membrane do?

Provides stability for the ulnar joints
Taut in pronation, loose in supination
Transmits forces from distal radius to the ulna and up the chain when compressive forces are applied

20

What does the oblique cord do?

Prevents separation of the radius and ulna when distractive forces are applies

21

What are the prime supinators of the forearm?

Biceps Brachii
Supinator

22

What are the prime pronators of the forearm?

Pronator teres
Pronator quadratus

23

What are the motions of the forearm?

Supination
Pronation
In the transverse plane and vertical axis

24

How is ROM of the forearm tested?

With the elbow at 90 degrees

25

What is the range of active flexion of the elbow

135-140

26

What is the range of passive flexion of the elbow?

150-160 degrees

27

What is the average total range of motion of the radioulnar joint?

150-180 degrees

28

What is the average ROM of supination?

80-90 degrees

29

What is the average ROM of pronation?

70-80 degrees