Wrist joint Flashcards
What type of joint is the wrist joint?
A synovial joint
What articulates at the wrist joint?
The distal end of the radius and the proximal row of carpel bones (except the pisiform)
What are the 4 ligaments in the wrist joint?
Palmar radiocarpel
Dorsal radiocarpel
Ulnar collateral
Radial collateral
What movement can occur at the wrist joint?
Adbudction
Adduction
Flexion
Extension
What are the 3 main injuries to the wrist joint?
Scaphoid fracture
Lunate anterior dislocation
Colles fracture
When can scaphoid fractures occur?
Falling on an outstretched hand.
When can anterior dislocation of the Lunate occur?
Falling on a dorsiflexed wrist.
What can anterior dislocation of the Lunate cause?
Extra point - How does it do this?
Can cause Carpel Tunnel syndrome
Extra point - Can do this as when dislocated it is pushed into the Carpel tunnel, so pressure is increased.
What is seen with a Colles fracture?
A dinner fork deformity
What causes a dinner fork deformity?
Fracture of the radius and displacement of the distal radial fragment and hand posteriorly.
What is the pathology in a Colles fracture?
A fracture in the radius.
Displacement of the distal radial fragment
Displacement of the hand posteriorly.
Why isn’t the Ulna part of the wrist joint?
It is joined to the radius in the radioulnar joint.
