Arthrokinematics & Convex/Concave Rule

Question 1

What is arthrokinematics?

Answer 1

Study of movement of one articular surface on another

Question 2

In the periphery, what is the movement named after?

Answer 2

The direction of motion of the distal bone

Question 3

How is movement named in the spine?

Answer 3

By the motion of the superior bone

Question 4

What are the ways joint surfaces can move?

Answer 4

• Spin (rotating around axis)
• Rock (concave moving)
• Roll (convex moving)
• Glide (slide)
• Traction/compression

Question 5

What does the convex/concave rule determine?

Answer 5

The relationship between the shape of the articulating joint surfaces and the direction of gliding

Question 6

What happens when a concave surface moves on a stationary convex surface?

Answer 6

Gliding will occur in the same direction as the rocking motion

Question 7

What happens when a convex surface moves on a stationary concave surface?

Answer 7

Gliding will occur in the opposite direction to the rolling motion

Question 8

What is the difference between passive physiological movement (PPM) and passive accessory movement (PAM)?

Answer 8

PPM
= PROM
= Links with osteokinematics

PAM
= Joint glides
= Links with arthrokinematics