Test 3: Elbow and Forearm Flashcards Preview

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Flashcards in Test 3: Elbow and Forearm Deck (41):
1

Elbow movements:

Flexion & extension
Supination & pronation

2

Uniaxial articulation (direction of one movement)
Articular surfaces allow motion in only one plane
Motions- flexion and extension

Ginglymus (hinge) joint

3

What are examples of a hinge joint in elbow?

ex. humeroulnar joint, humeroradial joint

4

Also uniaxial articulation
Motions
• Rotation, supination, pronation

Trochodial (pivot, screw joint)

5

Example of trochoidal joint

Proximal & distal radio-ulnar joints

6

Widest part of elbow

Epicondyles

7

Normal ROM for radioulnar (forearm) movements

Pronation/supination 70°/85°

8

Normal ROM Humeroulnar & Humeroradial Movments

Normal ROM
• 0° - 145°

(biceps get in the way)

9

Annular l. of radius

starts on radius, wraps around ulna, connects back to radius.

10

Ulnar collateral l. is usually associated with what sport position and what surgery?

Baseball pitchers
Tommy John's Surgery

11

Ligament that resists varus stress

Radial collateral

12

Ligament that stabilizes the proximal
radius during supination and pronation

Annular ligament

13

Origin of Biceps Brachii

Long head
• Supraglenoid tubercle of
scapula, labrum
Short head
• Coracoid process of the scapula

14

Insertion of bicep brachii

Tuberosity of the radius and
aponeurosis of the biceps
brachii

15

Action of biceps brachii

Flex the elbow
Supinate the forearm
Flex the shoulder
(something important about long head)

16

Origin of brachialis

Distal half of anterior surface of humerus

17

Insertion of brachialis

Tuberosity and coronoid
process of ulna

18

Action of brachialis

Flex the elbow

19

Location of brachialis

Deep to bicep brachii

20

Origin of brachioradialis

Proximal ⅔ of lateral
supracondylar ridge of
humerus (just remember lateral supracondylar ridge)

21

Insertion of brachioradialis

Styloid process of radius

22

Action of brachioradialis

Flex the elbow
Assist to pronate and
supinate the forearm when
these movements are
resisted
(not primary mover, assister)

23

Origin of the Triceps Brachii

Long head
• Infraglenoid tubercle of the
scapula
Lateral head
• Posterior surface of proximal ½ of humerus
Medial head
• Posterior surface of distal half
of the humerus

24

Insertion of triceps brachii

Olecranon process of the ulna

25

Action of the triceps brachii

All heads
• Extend the elbow
Long head
• Extend the shoulder
• Adduct the shoulder

26

`Origin of the pronator teres

Common flexor tendon from
medial epicondyle of humerus and coronoid process of the ulna

27

Insertion of the pronator teres

• Middle of lateral surface of the radius

28

Action of the pronator teres

• Pronate the forearm
• Assist to flex the elbow

29

Origin of the Supinator

• Lateral epicondyle of
humerus
• Radial collateral ligament
• Annular ligament
• Supinator crest of the ulna

30

Insertion of the supinator

• Anterior, lateral surface of
proximal ⅓ of radial shaft

31

Action of supinator

Supinate the forearm

32

Origin of the anconeus

Lateral epicondyle of the humerus

33

Insertion of the anconeus

Olecranon process and
posterior, proximal surface of
ulna

34

Actions of the anconeus

Extends the elbow

35

Origin of the pronator quadratus

Medial, anterior surface of distal ulna

36

Insertion of the pronator quadratus

Lateral, anterior surface of distal radius

37

Action of the pronator quadratus

Pronate the forearm

38

Synergists for Elbow Extension

Triceps brachii (all heads)
Anconeus

39

Synergists for Forearm Supination (Proximal and Distal Radioulnar Joints

Biceps brachii
Supinator
Brachioradialis (assists)

40

Synergists – Forearm Pronation (Proximal
and Distal Radioulnar Joints)

Pronator teres
Pronator quadratus
Brachioradialis (assists)

41

Synergists – Elbow Flexion

Biceps brachii
Brachialis
Brachioradialis
Flexor carpi radialis (assists)
Flexor carpi ulnaris (assists)
Palmaris longus (assists)
Pronator teres (assists)
Extensor carpi radialis longus (assists)
Extensor carpi radialis brevis (assists)