Elbow Biomechanics Flashcards Preview

PT 506 Kinesio / Biomechanics > Elbow Biomechanics > Flashcards

Flashcards in Elbow Biomechanics Deck (70):
0

four joints of arm

humeroulnar, humeroradial, proxmial radioulnar, distal radioulnar

1

radial head articulates with blank

capitulum

2

ulnar head articulates with blank

trochlea

3

elbow complex proximal has blank degrees of freedom for blank

1, flexion/extension

4

sup and inf ru joint is a blank joint for blank

pivot, pronation/supination (uniaxial)

5

joint capsule of elbow is blank

loose, weak anteriorly and posteriorly

6

joint capsule encloses all three blank joints

proximal

7

cross contamination of pathology can occur from one joint capsule bathed in common blank

synovial fluid

8

attachments of MCL of elbow

medial epicondyle, ulnar coronoid process

9

four ligaments of elbow

medial collateral (ulnar), lateral collateral (radial), annular ligament, interosseous membrane

10

posterior mcl attachments

medial epicondyle to ulnar coronoid and olecranon processes

11

anterior mcl is more significant during blank stability than blank

valgus, posterior

12

lcl extends from the blank to blank

inferior lateral epicondyle, annular ligament/olecranon

13

lcl resists blank stress

varus

14

strong circle ligament that stabilizes head of radius to ulna

annular

15

ligament between ulna and radius with fibers in all directions for strength

interosseous membrane

16

humeroulnar joint is blank on blank during flexion and extension

concave, convex

17

humeroradial joint is blank on blank during flexion and extension

concave, convex

18

proximal radioulnar joint does pronation and supination and blank spins on blank

radial head, capitulum

19

distal radioulnar joint does pronation and supination is blank radius on blank ulna

concave, convex

20

pronation of distal radioulnar joint is blank roll and blank glide

anterior (palmar)

21

supination of distal radioulnar joint is blank roll and glide

posterior (dorsal)

22

axis of motion of elbow is blank

oblique

23

axis of motion is usually blank to blank degrees on average of elbow

5-15

24

greater than 15 degrees of valgus axis

cubitus valgus

25

less than 5 degrees of valgus axis

cubitus varus

26

measuring carrying angle of elbow is done by measuring long axis of blank and blank

humerus, ulna

27

resting position of elbow, position in which the joint capusle and ligaments have greatest laxity and mobility

open pack position

28

position in which jooint capsule and ligaments are taut and has greatest congruency

close pack position

29

normal hyperextension at elbow

5-10 degrees

30

terminal extension is the blank position for humeroulnar but blank position for humeroradial

closed pack, open pack

31

humeroulnar joint is open pack at blank degrees flexion

70

32

humeroradial joint is closed pack at blank degrees flexion

90

33

any muscle in the body that is a mobility muscle

spurt muscle

34

biceps brachii is a blank muscle

spurt

35

spurt muscles can generate a lot of blank

torque

36

spurt muscles have insertions that are close to blank

joint

37

moment arm of biceps brachii is greatest between blank degrees of flexion

80-100

38

stabilizing muscles

shunt muscles

39

shunt muscle example

brachioradialis

40

insertion of shunt muscle is blank joint

far from

41

brachioradialis has a greater blank component than blank

compressive, rotary

42

moment arm of brachioradialis is greatest between blank and blank of flexion

100-110

43

brachioradialis is most effective with forearm in blank then blank then blank

neutral, pronation, supination

44

most important elbow flexor

brachialis

45

brachialis is a blank muscle

spurt

46

all positions of brachialis are efficient because it inserts on the blank which doesnt blank

ulna, move

47

brachialis is the blank muscle for elbow flexion

work horse

48

moment arm of brachialis is greatest at blank degrees flexion

100

49

tricep work horse

medial head

50

triceps active insufficiency shows up during blank

elbow extension

51

triceps acts blank with biceps during supination

synergistically (stabilizes)

52

anconeus attachments

lateral epicondyle (annular ligament), olecranon process (posterior capusle)

53

anconeus initiates blank

elbow extension

54

anconeus is active with forced finger blank and blank by acting as a blank

flexion, extension, stabilizer

55

open pack position of proximal radioulnar joint

70 elbow flexion, 35 supination

56

open pack position for proximal radioulnar joint is good for blank

joint play

57

closed pack position for proximal radioulnar joint and is a good position for blank

5 supination, elbow extended, stability

58

two muscles creating supination

supinator, biceps brachii

59

biceps is most effective for supination at blank degrees flexion

90

60

supinator is active in supination in all degrees of blank

elbow flexion

61

muscles creating pronation

pronator quadratus, pronator teres

62

pronator quadratus is a blank joint muscle

one

63

pronator teres is a blank joint muscle

2

64

pronator teres is blank powerful than pronator quadratus

less

65

golfers elbow is caused by overuse of blank muscles

pronator

66

pathology that is the annular ligament coming away from radial head

nursemaids elbow

67

poor pitching mechanics and caused by increased tensile stress throwing a ball

medial collateral ligament sprain

68

mcl (UCL) sprain at elbow may lead to blank carrying angle

increased valgus

69

a foosh most commonly fractures proximal blank or distal blank

ulna, radius