Wrist Complex Biomechanics - 3

Question 0

close chained movement of humeroulnar like hands on table causes blank to move instead of blank

Answer 0

ulna, radius

Question 1

degrees of freedom at humeroulnar joint

Answer 1

one (hinge)

Question 2

capitate is the blank of the hand to keep it blank

Answer 2

keystone, supported/stable

Question 3

central pillar effect in hand is due to what bone

Answer 3

capitate

Question 4

carpals allow blank movements

Answer 4

flexion/extension, ulnar/radial deviation

Question 5

aaos flexion value

Answer 5

80

Question 6

aaos extension value

Answer 6

70

Question 7

radial deviation aaos value

Answer 7

20

Question 8

ulnar deviation aaos value

Answer 8

30

Question 9

rc joint has a single blank surface that accomodates forearm and hand position

Answer 9

biconvex

Question 10

this is in the proximal carpal row and is a sesamoid bone but is not included in the rc joint

Answer 10

pisiform

Question 11

fcu blank is increased by pisiform

Answer 11

moment arm

Question 12

rc joint contributes to blank and blank more than blank and blank

Answer 12

flexion/ulnar dev, extension/radial dev

Question 13

no blank act directly on the blank joint

Answer 13

rc

Question 14

ic joints are between all blank bones

Answer 14

carpal

Question 15

ic joints allow minimal movement to accomodate blank and blank positioning

Answer 15

hand/wrist

Question 16

ic joints are bound by blank and have little give

Answer 16

ligaments

Question 17

ic ulnar side is more blank than radial

Answer 17

mobile

Question 18

blank ligaments are stronger than blank ligaments at ic joints hence why we extend wrists extinctively when we fall

Answer 18

palmar, dorsal

Question 19

most commonly dislocated carpal due to instability palmarly

Answer 19

lunate

Question 20

ganglion cyst formation occurs at the proximal pole of the scaphoid because it has no blank

Answer 20

ligament attachment dorsally

Question 21

ligaments are blank movers

Answer 21

passive

Question 22

most stable ligaments because there are 3 rather than one like on the dorsal aspect of hand

Answer 22

volar radiocarpal ligament

Question 23

rc joint contributes more to blank than mc joint

Answer 23

flexion

Question 24

mc joint contributes more to blank than rc joint

Answer 24

extension

Question 25

rc joint is blank carpals moving on blank radius

Answer 25

convex, concave

Question 26

flexion of rc joint is a palmar roll and blank glide

Answer 26

dorsal

Question 27

extension of rc joint is a blank roll and palmar glide

Answer 27

dorsal

Question 28

radial dev of rc joint is blank roll and blank glide

Answer 28

radial, ulnar

Question 29

ulnar deviation is blank roll and blank glide

Answer 29

ulnar, radial

Question 30

with flexion, the blank flexes, the blank and blank extend.... this is called blank which increases ligament tension and stability

Answer 30

scaphoid, lunate/triquetrum, counter rotation,

Question 31

coming together of carpal articular surfaces increases blank

Answer 31

stability

Question 32

extension causes scaphoid to blank, while blank and blank flex

Answer 32

extend, lunate, triquetrum

Question 33

two halves of the blank joint

Answer 33

mc (midcarpal)

Question 34

2 halves of mc joint

Answer 34

radial, ulnar

Question 35

ulnar side of mc joint is blank hamate and capitate moving on blank lunate and triquetrum in frontal and sagittal planes

Answer 35

convex, concave

Question 36

radial side of mc joint is blank trapezoid and trapezium moving on blank scaphoid in frontal and sagittal planes

Answer 36

concave, convex

Question 37

blank deviation helps stability of rc and mc because they will be blank

Answer 37

radial, close packed

Question 38

ulnar side of mc and the whole rc are linked blank

Answer 38

anatomically/functionally (vex on cave)

Question 39

radial side of mc and the whole rc are linked blank

Answer 39

anatomically (cave on vex)

Question 40

secondary wrist action is from muscles that cause movement at blank primarily

Answer 40

digits

Question 41

origins/insertions pictures are well shown on the ppoint for lecture

Answer 41

ok

Question 42

ecrb attaches at the 3rd digit at the base so its only job is to blank

Answer 42

exten

Question 43

if ed was compensating for weak ecr, we would also get blank rather than just wrist extension

Answer 43

finger extension

Question 44

adm originates at blank

Answer 44

pisiform

Question 45

fcu contraction stabilizes blank to allow abduction of blank digit

Answer 45

pisiform, 5th

Question 46

adaptive shortening in a quadraplegic allows for better blank

Answer 46

function

Question 47

where adaptive shortening is good for function

Answer 47

tenodesis

Question 48

example of tenodesis function

Answer 48

grabbing a cup

Question 49

fcu and ecu allows pure ulnar deviation are blank

Answer 49

equal to each other