mod 3 hand

Question 1

what are the two jts at the wrist

Answer 1

1. radiocarpal jt
2. midcarpal jt

(permites large rom + tighter capsul)

Question 2

where does the dorsal radiocarpal lig run and what does it maintain

Answer 2

radial styloid-> lunate + triquetrum

-maintains lunate against radius

Question 3

steps of flexion at the wrist

Answer 3

1. distal row moves on prox row
2. radiocapitate becomes taut at neutral and and distal row moves on prox
3. scapholunate lig gets taut and carpals move on radius

Question 4

what resists hyper extention at the metacarpal phalangeal jts

Answer 4

volar plates

Question 5

what does the scaphoid rotate on as you extend teh hand

Answer 5

schaphoid on lunate

then.. schaphoid on radius

Question 6

what movements does the 1 +5th carpometacapals have and 2-4

Answer 6

1+5- flex/ext abd+add

2-4 only flex ext (2nd+3rd esetionally immobile)

Question 7

pattern of digit flexion

Answer 7

increase in flex from 2nd to 5th digit- angulation toward the thumb

Question 8

what structures allow for our fingers to function + keep an intact gliding mechanism

Answer 8

1. retinacula (pulley)
2. annular ligs (pulley)
3. lubercation + protection bursa +sheath

Question 9

what is stenosing tenosynovitis

Answer 9

trigger finger
-repetative trauma to the tendon results in formation of nodules on tendon and thickening of the annular pullys

can stop/ limit finger flex/ext

Question 10

what is more active FDS or FDP

Answer 10

FDP as it goes more distal

Question 11

cylindrical grip- what pos does your hand need to be in what finger provide only 70% of teh power

Answer 11

accompanied by ulnar deviation if alot of power is needed

ring and lil finger only generate about 70% of the power as the other fingies