Wrist joint Flashcards Preview

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Flashcards in Wrist joint Deck (24)
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1
Q

describe the 3 radioulnar joints

A

proximal-annular-pivot type
middle-interosseous membrane
distal-round head of ulna, notch of radius, radioulnar ligament

2
Q

what movements are allowed at the radioulnar joints

A

pronation/supination

3
Q

What bones are involved in the radiocarpal (Wrist) joint?

A

radius articulates with scaphoid, lunate, triquetrum

4
Q

What ligaments provide stability to the wrist joint

A

ulnar collateral ligaments-ulnar styloid to triquetrum

radial collateral ligament-radial styloid to scaphoid

5
Q

What provides stability at the MCP, PIP and DIP

A

Transverse metacarpal ligament
metacarpophalangeal collateral ligaments
phalangeal collateral ligaments

6
Q

what movements can the wrist do

A

flexion extension
abd add
rotation (all 4)

7
Q

What ligament creates the carpal tunnel?

A

transverse carpal ligament

8
Q

What is contained in the carpal tunnel?

A

median n. and 9 tendons
flexor digitorum superficialis t.
flexor digitorum profundus t.
flexor pollicis longus t.

9
Q

What ligament creates the ulnar tunnel? contents?

A

palmar carpal ligament

ulnar n. and a.

10
Q

what causes carpal tunnel syndrome? sx?

A

compression of median n due to overuse
neuropathy, muscle atropha in thenar
heal with rest or surgery

11
Q

which carpal bone is most commonly fractured? why?

A

scaphoid, largest interface with radius

12
Q

Why doesnt the ulna fracture often?

A

all the weight is put on the radius cause the ulna has no articulation with the wrist

13
Q

describe a colles fracture. how would this person fall? where would their fracture displace the distal radius? xray appearance?

A

FOOSH, hyperextended wrist
moves distal radius posteriorly/dorsally (wrist is gonna move in direction hand is bending)
“dinner fork”

14
Q

describe a smiths fracture. how would this person fall? where would their fracture displace the distal radius? xray appearance?

A

FOOSH, hyperflexed wrist
moves distal radius anteriorly/ventrally
“shovel deformity”

15
Q

what is a swan neck deformity?

A

extension of PIP, flexion of DIP

caused by rheumatoid arthritis/untreated mallet finger

16
Q

your patient has an extended PIP and flexed DIP. what is this

A

swan neck deformity

17
Q

your patient has an anteriorly displaced distal radius fracture that looks like a dinner fork after a FOOSH, what is this called?

A

colles fracture

18
Q

your patient has an posteriorly displaced distal radius fracture that looks likes shovel after a FOOSH, what is this called?

A

smiths fracture

19
Q

what is a boutonnier deformity? cause?

A

PIP flex
DIP hyper extend
cause: rupture of central slip of extensor tendon at PIP

20
Q

what is mallet finger?cause?

A

DIP flexed, extensor tendon damage

cause: blunt force trauma

21
Q

what causes skiers thumb?

A

trauma to the thumb usually from skiers cause their poles

rupture of collateral ligament of MCP joint of thumb

22
Q

skiier comes in and hes like oh shit my thumb is hurt this sucks! Since you payed attention in class you know which structure is most likely damaged, what is it?

A

collateral ligament of MCP joint of thumb

23
Q

Kid comes in and hes like man i love potentially dying every time i ride a bull cause thats a totally sensible hobby, but boy does it make my wrist hurt and prevents me from jacking off to my favorite pornography, since anatomy is such a thrilling subject and cant get enough of it, which structure is likely causing the pain and what is this condition called?

A

radial collateral ligament
bull riders thumb
possible avulsion fracture

24
Q

Ouch! your friend just punched you in the face cause you stole his pog collection! but jokes on him, he stands there screaming in pain because his hand hurts so bad as you run off smiling despite being hit in the face because of your newly obtained collection of pogs. What damage did your friend do to their hand? what is this called?

A

likely fracture of the 5th metacarpal because it leads when you punch,
this is known as a boxers fracture