18 Questions
Arthrokinematics primarily focuses on:
The movements occurring between joint surfaces
Equilibrium, in the context of kinetics, is best described as:
A balanced state with no acceleration
In the context of kinetics, statics refers to situations where:
The body is at rest
Which type of kinematics examines how, when, and where motions occur between adjacent joint surfaces?
Arthrokinematics
What does kinetics examine in relation to forces affecting motion?
The causes of motion
Closed kinematic chain refers to:
Motions that occur between adjacent joint surfaces
During knee extension, what type of motion occurs between the femoral condyles and the tibial condyles?
All of the above
What is the clinical importance of arthrokinematics in joint movement?
Allows for a larger range of motion with a small articular surface
In a kinematic chain, what does a closed kinetic chain refer to?
The proximal segment moves freely while the distal segment is fixed.
Which activity best represents an open-chain motion?
Reaching or bringing the hand to the mouth
What is an example of a closed kinematic chain motion?
A squat exercise
Which statement about kinematic chains is accurate?
A squat exercise is an example of an open-chain motion.
In the context of arthrokinematic relationships, what happens when the bone with the convex joint surface moves on the bone with the concavity?
The concave joint surfaces move in the opposite direction to the bone segment
What type of motion occurs during shoulder abduction according to the text?
Downward motion of the humeral head on the Glenoid Cavity when the humerus is moving upward
During squat motion, what type of chain motion is typically involved?
Alternation of closed-chain motion and open-chain motion
In walking and stair climbing, what kind of activity alternates between closed-chain and open-chain motion?
Walking and stair climbing
During crutch-walking, how do the arms move in relation to the body?
The arms remain fixed while the body moves in relation to them
When sitting down in a chair, which type of chain motion occurs as described in the text?
The thigh approaches the pelvis (hip flexion)
This quiz covers the clinical significance of arthrokinematics in the knee joint, focusing on the combination of rolling, sliding, and spinning motions. Understanding these movements is crucial for achieving a large range of motion with minimal stress on the joint surfaces.
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