Articular Movement (EXAM 1)

Question 1

Osteokinematics

Answer 1

Observable movements of bones in space

Question 2

Spin

Answer 2

Pure bony rotational movement occurring around a defined mechanical axis

Question 3

Swing

Answer 3

Any multiplanar bony movement in diagonal or oblique patterns

Question 4

Pure Swing

Answer 4

• Cardinal plane movement (movement not simultaneous with a spin)
• Not really functional

Question 5

Impure Swing

Answer 5

Arcuate movement (rotation or spin is simultaneous with movement)

Question 6

Arthrokinematics

Answer 6

• Unobservable articular movements between adjacent joint surfaces (roll, glide, and spin)
• These accessory motions take place with all active and passive movements and are necessary for full, pain free range of motion

Question 7

Roll

Answer 7

• New points on one surface come into contact with new points on the opposing surface (like a tire rolling on the ground)
• Rolling only occurs when the two articulating surfaces are incongruent.

Question 8

Glide

Answer 8

• Translatory motion in which one constant point on one surface is contacting new points on the other surface.
• Pure gliding can occur when two surfaces are congruent and flat or congruent and curved.
• Glide only occurs involuntarily and can be referred to as translation or translatory glide

Question 9

3 Rules of Arthrokinematics

Answer 9

• Roll Rule
• Concave Rule
• Convex Rule

Question 10

Roll Rule

Answer 10

Roll always occurs in the direction of bone movement (ant/post or sup/inf)

Question 11

Concave Rule

Answer 11

In relationship to the concave surface, roll & glide occur in the same direction

Question 12

Convex Rule

Answer 12

In relationship to the convex surface, roll & glide occur in the opposite direction