Arthrokinematics

Question 1

What is an arthrokinematic movement?

Answer 1

• An ACCESSORY movement
• The motion occurring between joint surfaces
• Roll, slide, spin

Question 2

Convex-Concave Rule

Answer 2

ConVEX on ConCAVE - When a convex surface moves on a stable concave surface. ConVEX surface occurs in the opposite direction of the motion of the bony lever. Hip flexion - bony lever goes UP (roll) and the convex surfaces goes DOWN (slide).

ConCAVE on ConVEX - When a concave surface is moving on a stable convex surface, sliding occurs in the SAME direction as the bony lever (tibia on femur).

Question 3

Arthrogenic effects from an arthokinematic movement?

Answer 3

• Increase in ROM
• Stimulate joint and soft tissue receptors
• Capsular stretch
• Restore the accessory glide movement