Concave Convex Rule

If a stationary joint is moving on a concave surface, the bone moves in what direction?

Same direction the body segment is moving (glide and roll move in same direction)

If a convex surface is moving on a stationary concave surface, the bone will move in which direction?

Opposite direction of bone movement (roll and glide will slide opposite to each other)

TRUE or FALSE: Roll does not always occur in the same direction that the body segment is moving.

FALSE

Characteristics of joints that roll?

surfaces are incongruent, "new on new", results in angular motion, always in same direction of swinging bone

Characteristics of joints that glide?

surfaces are congruent, "same on new", direction depends on whether surface is concave or convex

TRUE or FALSE: A slide is a pure translation if two surfaces are congruently flat or curved.

TRUE

What arthrokinematics exist at the shoulder with shoulder abduction?

SUPERIOR roll of the head of the humerus, INFERIOR glide in the joint capsule

What arthrokinematics exist at the knee when going from sit to stand?

ANTERIOR roll of the femur, POSTERIOR glide of the tibia

What arthrokinetmatics exist at the knee when performing knee extension?

ANTERIOR roll of the femur, ANTERIOR glide of the tibia

What are Grades I and II primarily used for with the Maitland technique?

Relieving pain

Which grades in the Kaltenborn technique can be used for pain relief?

Grades I and II

What can you use Grade III for in the Kaltenborn technique?

Stretch joint structures and increase joint play

What is the order of amplitudes in Maitland?

Small at beginning, large throughout, large at end, small past end range

Which speed of oscillation should you use to help decrease the amount of muscle guarding in your patient?

Slow speeds

What speed of oscillation should you use to help decrease the amount of pain in your patient?

High speeds

What is the real purpose behind used joint mobilization techniques?

To decrease pain, maintain the amount of joint play available in a joint, and reduce lasting effects of mechanical limitations

TRUE or FALSE The treatment plane is perpendicular to the line running from the axis of rotation to the middle of a convex articular surface.

FALSE

In which direction should you apply force in order to get distraction of the joint in regard to the treatment plane?

Away from the treatment plane

What is the major limitation of joint mobilization techniques?

We can't change the disease or inflammatory process in a body.

How do the rotator cuff muscles contribute to the arthrokinematics of the shoulder with abduction?

Helps with the sliding of the humeral head