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PT 506 Kinesio / Biomechanics > Elbow Biomechanics > Flashcards

Elbow Biomechanics Flashcards

0
Q

radial head articulates with blank

A

capitulum

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1
Q

four joints of arm

A

humeroulnar, humeroradial, proxmial radioulnar, distal radioulnar

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2
Q

ulnar head articulates with blank

A

trochlea

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3
Q

elbow complex proximal has blank degrees of freedom for blank

A

1, flexion/extension

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4
Q

sup and inf ru joint is a blank joint for blank

A

pivot, pronation/supination (uniaxial)

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5
Q

joint capsule of elbow is blank

A

loose, weak anteriorly and posteriorly

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6
Q

joint capsule encloses all three blank joints

A

proximal

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7
Q

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

A

synovial fluid

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8
Q

attachments of MCL of elbow

A

medial epicondyle, ulnar coronoid process

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9
Q

four ligaments of elbow

A

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

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10
Q

posterior mcl attachments

A

medial epicondyle to ulnar coronoid and olecranon processes

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11
Q

anterior mcl is more significant during blank stability than blank

A

valgus, posterior

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12
Q

lcl extends from the blank to blank

A

inferior lateral epicondyle, annular ligament/olecranon

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13
Q

lcl resists blank stress

A

varus

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14
Q

strong circle ligament that stabilizes head of radius to ulna

A

annular

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15
Q

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

A

interosseous membrane

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16
Q

humeroulnar joint is blank on blank during flexion and extension

A

concave, convex

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17
Q

humeroradial joint is blank on blank during flexion and extension

A

concave, convex

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18
Q

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

A

radial head, capitulum

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19
Q

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

A

concave, convex

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20
Q

pronation of distal radioulnar joint is blank roll and blank glide

A

anterior (palmar)

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21
Q

supination of distal radioulnar joint is blank roll and glide

A

posterior (dorsal)

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22
Q

axis of motion of elbow is blank

A

oblique

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23
Q

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

A

5-15

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24
Q

greater than 15 degrees of valgus axis

A

cubitus valgus

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25
Q

less than 5 degrees of valgus axis

A

cubitus varus

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26
Q

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

A

humerus, ulna

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27
Q

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

A

open pack position

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28
Q

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

A

close pack position

29
Q

normal hyperextension at elbow

A

5-10 degrees

30
Q

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

A

closed pack, open pack

31
Q

humeroulnar joint is open pack at blank degrees flexion

32
Q

humeroradial joint is closed pack at blank degrees flexion

33
Q

any muscle in the body that is a mobility muscle

A

spurt muscle

34
Q

biceps brachii is a blank muscle

35
Q

spurt muscles can generate a lot of blank

36
Q

spurt muscles have insertions that are close to blank

37
Q

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

38
Q

stabilizing muscles

A

shunt muscles

39
Q

shunt muscle example

A

brachioradialis

40
Q

insertion of shunt muscle is blank joint

41
Q

brachioradialis has a greater blank component than blank

A

compressive, rotary

42
Q

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

43
Q

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

A

neutral, pronation, supination

44
Q

most important elbow flexor

A

brachialis

45
Q

brachialis is a blank muscle

46
Q

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

A

ulna, move

47
Q

brachialis is the blank muscle for elbow flexion

A

work horse

48
Q

moment arm of brachialis is greatest at blank degrees flexion

49
Q

tricep work horse

A

medial head

50
Q

triceps active insufficiency shows up during blank

A

elbow extension

51
Q

triceps acts blank with biceps during supination

A

synergistically (stabilizes)

52
Q

anconeus attachments

A

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

53
Q

anconeus initiates blank

A

elbow extension

54
Q

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

A

flexion, extension, stabilizer

55
Q

open pack position of proximal radioulnar joint

A

70 elbow flexion, 35 supination

56
Q

open pack position for proximal radioulnar joint is good for blank

A

joint play

57
Q

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

A

5 supination, elbow extended, stability

58
Q

two muscles creating supination

A

supinator, biceps brachii

59
Q

biceps is most effective for supination at blank degrees flexion

60
Q

supinator is active in supination in all degrees of blank

A

elbow flexion

61
Q

muscles creating pronation

A

pronator quadratus, pronator teres

62
Q

pronator quadratus is a blank joint muscle

63
Q

pronator teres is a blank joint muscle

64
Q

pronator teres is blank powerful than pronator quadratus

65
Q

golfers elbow is caused by overuse of blank muscles

66
Q

pathology that is the annular ligament coming away from radial head

A

nursemaids elbow

67
Q

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

A

medial collateral ligament sprain

68
Q

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

A

increased valgus

69
Q

a foosh most commonly fractures proximal blank or distal blank

A

ulna, radius

PT 506 Kinesio / Biomechanics (14 decks)

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