Arthrokinematics Flashcards Preview

Biomechanics > Arthrokinematics > Flashcards

Flashcards in Arthrokinematics Deck (21)
Loading flashcards...
1
Q

Define arthrokinematics.

A

Describes the motion that occurs btwn the articular surfaces of joints

2
Q

True/False: Most joint surfaces are curved w/1 surface being relatively convex/concave.

A

TRUE

3
Q

Define convex.

A

Curved/rounded outward

4
Q

Define concave.

A

Hollowed/Rounded inward

5
Q

What is the convex-concave relationship?

A

Increases contact surface area of joint, contributes to increased joint stability, increases dissipation of contact forces, helps guide motions btwn bones

6
Q

What are the 5 movements that occur btwn joint surfaces?

A

Roll, slide, spin, distraction/longitudinal traction, compression

7
Q

What is the definition of the movement ‘roll’?

A

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

8
Q

What does the movement ‘roll’ occur with, where, and give an example?

A

Combo w/ sliding/spinning, incongruent/unequal surfaces, femoral condyles rolling on tibial plateau

9
Q

What is the definition of the movement ‘slide/glide’? Give an example.

A

single point on 1 articular surface, the more congruent the surfaces are the more sliding there is
carpal bones sliding along their facet surfaces

10
Q

What is the definition of the movement ‘spin’? Give an example.

A

Single point on 1 articular surface rotates on a single point on another articular surface (rotates around a stationary longitudinal mechanical axis)
Head of the radius at the humeroradial joint during pronation/supination

11
Q

What is the definition of the movement ‘distraction & longitudinal traction’? What is it used for?

A

Joint surfaces are pulled apart, used to stretch a joint capsule & mobilize a joint

12
Q

What is the definition of the movement ‘compression’?

A

Decrease in the space btwn 2 joint surfaces, adds stability to a joint, normal response to muscle contraction

13
Q

What is the convex-on-concave & concave-on-convex rule?

A

Describes the relationship of rolling & sliding motion w/in a joint when 1 joint surface is convex & the other surface is concave

14
Q

What is the convex-on-concave motion?

A

When the concave side of a joint is stabilized (anchored) the convex joint surface slides (glides) in the opposite direction as it rolls

15
Q

What is the concave-on-convex motion?

A

When the convex side of a joint is stabilized (anchored) the concave joint surface slides (glides) in the same direction as it rolls

16
Q

What is the clinical significance of the C-C rules?

A

Serve as a basis for joint mobilization techniques, mobilizing a joint to restore movement requires that the clinician apply external forces to the joint that facilitate (restore) the natural arthrokinematic motions as the joint

17
Q

What are physiological movements?

A

movement of bones done voluntarily osteokinematics

18
Q

What are accessory movements?

A

Name given to the arthrokinematic movements w/in the joint & surrounding tissues that are necessary for normal joint range of motion, but cannot be performed voluntarily. (necessarily for full range of physiological motion to occur, ligament & joint capsule limitations (tightness) cause movement restrictions/aberrant joint motion)

19
Q

What is joint play?

A

motions that occur w/in the joint but only as a response to an outside force, determined by joint’s capsule’s laxity, can be demonstrated passively but not performed activelly

20
Q

What is end-feel?

A

way to interpret & measure joint play movements

21
Q

How does the treatment in regards to the CC Rules look like?

A

Tx often combines facilitation of physiological mobilization (osteokinematic) & accessory movements (arthrokinematic) to restore a particular jt movement. Follow CC rule to restore norm. joint play which will increase pain-free jt range of motion.