Clinical Importance of Arthrokinetic Movements in the Knee Joint

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Questions and Answers

Arthrokinematics primarily focuses on:

  • The movements occurring between joint surfaces (correct)
  • The study of forces that lead to motion
  • The movements of bones
  • The forces affecting motion

Equilibrium, in the context of kinetics, is best described as:

  • A state with chaotic motion
  • A balanced state with no acceleration (correct)
  • A state of acceleration
  • A state with no forces acting on the body

In the context of kinetics, statics refers to situations where:

  • The body is accelerating
  • The body is in motion
  • The body is at rest (correct)
  • There is no acceleration

Which type of kinematics examines how, when, and where motions occur between adjacent joint surfaces?

<p>Arthrokinematics (D)</p> Signup and view all the answers

What does kinetics examine in relation to forces affecting motion?

<p>The causes of motion (B)</p> Signup and view all the answers

Closed kinematic chain refers to:

<p>Motions that occur between adjacent joint surfaces (C)</p> Signup and view all the answers

During knee extension, what type of motion occurs between the femoral condyles and the tibial condyles?

<p>All of the above (D)</p> Signup and view all the answers

What is the clinical importance of arthrokinematics in joint movement?

<p>Allows for a larger range of motion with a small articular surface (C)</p> Signup and view all the answers

In a kinematic chain, what does a closed kinetic chain refer to?

<p>The proximal segment moves freely while the distal segment is fixed. (D)</p> Signup and view all the answers

Which activity best represents an open-chain motion?

<p>Reaching or bringing the hand to the mouth (C)</p> Signup and view all the answers

What is an example of a closed kinematic chain motion?

<p>A squat exercise (D)</p> Signup and view all the answers

Which statement about kinematic chains is accurate?

<p>A squat exercise is an example of an open-chain motion. (A)</p> Signup and view all the answers

In the context of arthrokinematic relationships, what happens when the bone with the convex joint surface moves on the bone with the concavity?

<p>The concave joint surfaces move in the opposite direction to the bone segment (C)</p> Signup and view all the answers

What type of motion occurs during shoulder abduction according to the text?

<p>Downward motion of the humeral head on the Glenoid Cavity when the humerus is moving upward (B)</p> Signup and view all the answers

During squat motion, what type of chain motion is typically involved?

<p>Alternation of closed-chain motion and open-chain motion (D)</p> Signup and view all the answers

In walking and stair climbing, what kind of activity alternates between closed-chain and open-chain motion?

<p>Walking and stair climbing (C)</p> Signup and view all the answers

During crutch-walking, how do the arms move in relation to the body?

<p>The arms remain fixed while the body moves in relation to them (C)</p> Signup and view all the answers

When sitting down in a chair, which type of chain motion occurs as described in the text?

<p>The thigh approaches the pelvis (hip flexion) (C)</p> Signup and view all the answers

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