Arthrokinematics

Question 1

Arthrokinematics

Answer 1

Motion occurring between joint articular surfaces

Question 2

Convex-concave joint relationship

Answer 2

• Improves fit and stability
• Properly guides motion

Question 3

Convex joint

Answer 3

Curves outwards

Question 4

Concave joint

Answer 4

Curves inwards

Question 5

Fundamental movements between joint surfaces

Answer 5

• Roll
• Slide
• Spin

Question 6

Roll (fundamental movements between joint surfaces)

Answer 6

Multiple points along one rotating articular surface contact multiple points on another articular surface

Question 7

Slide (fundamental movements between joint surfaces)

Answer 7

Single point on one articular surface contacts multiple points on another articular surface

Question 8

Spin (fundamental movements between joint surfaces)

Answer 8

• Single point on one articular surface rotates on a single point on another articular surface (always occurs about a central longitudinal axis of rotation)
• Always occurs about a central longitudinal axis of rotation

Question 9

Two fundamental movements between joint surfaces rules

Answer 9

Rule 1: Convex-on-concave
Rule 2: Concave-on-convex

Question 10

Rule 1: Convex-on-concave (fundamental movements between joint surfaces rule)

Answer 10

The arthrokinematic roll and the arthrokinematics slide occur in opposite directions

Question 11

Rule 2: Concave-on-convex (fundamental movements between joint surfaces rule)

Answer 11

The arthrokinematic roll and the arthrokinematics slide occur in the same direction