Wrist Complex

Question 1

What movements occur at the radiocarpal joints?

Answer 1

Ant/Pos and Med/Lat

Flexion + folding
Extension + fanning
Radial/Ulnar Deviation

Question 2

Describe the arthrokinematics of ulnar and radial deviation?

Answer 2

Based on the concave/convex rule the Proximal row of radiocarpal joints is concave and the distal row is convex.

Ulnar = Medial roll and lateral slide
radial = lateral roll and medial slide 

roll occurs at midcarpal, slide occurs at proximal

Question 3

Describe the arthrokinematics of the distal radiocarpal joint?

Answer 3

Based on the concave/convex rule the Proximal row of the radiocarpal joint is concave and the distal row is convex.

Flexion, posterior slide and anterior roll
Extension, anterior slide and posterior roll

Question 4

What are the most common wrist/hand injuries?

Answer 4

Distal radius #
Scaphoid #
Scapho-lunate ligament

Question 5

What is the only unmodified sellar joint in the body?

Answer 5

1st CMC joint

Question 6

Describe the arthrokinematics of 1st CMC joint

Answer 6

Flexion, ulnar glide and roll
Extension, radial glide and roll
- Concave MC on convex trapezium

Add, anterior glide
Abd, posterior glide
- Convex MC on concave trapezium

Question 7

What is the arthrokinematic difference between the MCP and IP joints?

Answer 7

MCP 2 DOF
IP 1 DOF

Concave on Convex, roll, and slide in same direction

Question 8

what is the most commonly dislocated carpal bone?

Answer 8

Lunate