Week 6: Elbow and Forearm Flashcards Preview

Fall 2014: Anatomy & Kinesiology > Week 6: Elbow and Forearm > Flashcards

Flashcards in Week 6: Elbow and Forearm Deck (56):
1

Origin (1) of Brachialis

Distal ½ of the anterior shaft of the humerus

2

Insertion (1) of Brachialis

Ulnar tuberosity

3

Innervation (1) of Brachialis

Musculocutaneous N. (C5-C7)

4

Action (1) of Brachialis

Flexion of the forearm (in pronation)

5

Origin (2) of Biceps Brachii

LH: supraglenoid tubercle of the scapula
SH: Coracoid process of the scapula

6

Insertion (2) of Biceps Brachii

Radial Tuberosity and fascia at the medial elbow

7

Innervation (1) of Biceps Brachii?

Musculocutaneous N. (C5-C7)

8

Action (1) of Biceps Brachii?

Flexion of forearm (in supination)

9

Origin (1) of Brachioradialis
- which side?

Lateral supracondylar ridge of the humerus

10

Insertion (1) of Brachioradialis?

Styloid process of the radius

11

Innervation (1) of Brachioradialis?

Radial N. (C5-T1)

12

Action (1) of Brachioradialis?

Flexion of forearm (in neutral)

13

Origin (3) of Triceps Brachii

Long Head: infraglenoid tubercle of the scapula
Lateral Head: posterior shaft of the humerus
Medial-deep Head:posterior shaft of the humerus

14

Insertion (1) of Triceps Brachii

Olecranon process of the ulna

15

Innervation (1) of Triceps Brachii?

Radial N. (C5-T1)

16

Action (1) of Triceps Brachii?

Extension of forearm

17

Origin (1) of Anconeus?

Lateral epicondyle of the humerus

18

Insertion (1) of Anconeus?

Posterior proximal ulna

19

Innervation (1) of Anconeus?

Radial N. (C5-T1)

20

Action (1) of Anconeus?

Extension of the forearm

21

Origin (2) of Supinator?
**Remember there are 2 separate parts

Lateral epicondyle of the humerus and proximal ulna

22

Insertion (1) of Supinator?

Proximal radius

23

Innervation (1) of Supinator?

Radial N. (C5-T1)

24

Action (1) of Supinator?

supinate the forearm

25

Origins (2) of Pronator Teres

Humeral head- medial epicondyle of the humerus via the common flexor tendon
Ulnar head- Coronoid process of the ulna

26

Insertion (1) of Pronator Teres?

Lateral radius

27

Innervation (1) of Pronator Teres?

Median N. (C5-T1)

28

Action (1) of Pronator Teres?

Pronation of the forearm

29

Origin (1) of PQ?

Anterior distal ulna

30

Insertion (1) of PQ?

Anterior distal radius

31

Innervation (1) of PQ?

Median N. (C5-T1)

32

Action (1) of PQ?

Pronation of the forearm

33

What is the closed pack position of the ulnohumeral joint?

full extension

34

What is the resting position of the ulnohumeral joint?

70 degrees elbow flexion with 10 degrees supination

35

What is the closed pack position of the radiohumeral joint?

90 degrees of flexion
5 degrees of supination

36

What is the resting position of the radiohumeral joint?

full elbow extension with full FA supination

37

What is the closed pack position of the radioulnar joint?

full pronation or full supination

38

What is the resting position for the radioulnar joint?

70 degrees flexion
35 degrees supination

39

What 3 things articulations occur in the ulnohumeral joint?

1. trochlea (distal humerus) to trochlear notch (ulna)
2. coronoid process (ulna) to coronoid fossa (distal humerus)
3. olecranon process (ulna) to olecranon fossa (distal humerus)

40

What articulation occurs in the radiohumeral joint?

capitulum (humerus) to radial head (radius)

41

The ulnar collateral ligament connects what structures?

Ulna and humerus

Medial epicondyle to the Coronoid and Olecranon process

42

The radial collateral ligament connects what structures?

radius and humerus

lateral epicondyle to the olecranon process

43

The annular ligament connects what structures?

proximal radius to proximal ulna

anterior and posterior aspect of the radial notch

44

Function of the radioulnar joint?

movement between the radius and ulna in pronation and supination

45

What happens during pronation to the radius and ulna?

The proximal radius rotates and the distal end cross over the ulna diagonally

46

Which is more powerful: supination or pronation?

supination

47

T/F: muscles that pronate/supinate the arm insert on the ulna?

False, they insert on the radius

48

T/F: in pronation/supination, the radius does the movement?

True

49

What are the 3 radioulnar joint articulations?

1. Proximal
2. Middle
3. Distal

50

Which ligament surrounds the radioulnar joint and attaches it to the radial notch on the ulna?

Annular ligament

51

What things articulate in the proximal radioulnar joint?

the radial head (radius) with the radial notch (ulna)

52

What functions to maintain the articulation between the radius and ulna?

interosseous membrane

53

T/F: the middle radioulnar joint is a true joint?

False, it does not restrict movement

54

What 2 things articulate in the distal radioulnar joint?

the head of the ulna and distal end of the radius

55

How is the distal radioulnar joint held together?

By a disc of fibrocartilage joining the styloid (ulna) to the ulnar notch (radius)

56

Whats the most common joint classification?

3rd class lever