Which movement involves a series of points on one articular surface contacting a series of points on another surface?

Which movement involves a series of points on one articular surface contacting a series of points on another surface?

• A. Roll/Rock Movement
• B. Glide/Slide/Translation Movement
• C. Arthrokinematics
• D. Osteokinematic Motion

Answer: (A)

In arthrokinematics, roll is when a series of points on one articular surface contact a series of points on the other surface as the joint moves. It’s like a wheel rolling along a road—the contact point moves across both surfaces, with new points engaging as movement continues. This matches the description of multiple points on one surface contacting multiple points on the other. In contrast, glide (translation) involves a single point on one surface contacting a series of points on the other surface, not a series on both. Spin is rotation about a fixed point with little to no surface contact translation. Arthrokinematics is the overall study of joint surface movement, while osteokinematic motion refers to the gross movement of bones (like flexion or extension).

In arthrokinematics, roll is when a series of points on one articular surface contact a series of points on the other surface as the joint moves. It’s like a wheel rolling along a road—the contact point moves across both surfaces, with new points engaging as movement continues. This matches the description of multiple points on one surface contacting multiple points on the other.

In contrast, glide (translation) involves a single point on one surface contacting a series of points on the other surface, not a series on both. Spin is rotation about a fixed point with little to no surface contact translation. Arthrokinematics is the overall study of joint surface movement, while osteokinematic motion refers to the gross movement of bones (like flexion or extension).