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fifth kinematic principle of abduction 2 - N

12 Questions

1 Views

fifth kinematic principle of abduction 2 - N

Created by

@LawfulNovaculite

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Questions and Answers

What drives posterior rotation of the clavicle?

Muscle-to-bone forces

Multijoint kinematics and muscle-to-ligament forces (correct)

Ligament-to-bone forces

Bone-to-bone forces

Which ligament is relatively slackened at rest?

Coracohumeral ligament

Coracoclavicular ligament (correct)

Glenohumeral ligament

Acromioclavicular ligament

What happens to the coracoclavicular ligament during upward rotation of the scapula?

It slackens

It stretches (correct)

It tears

It contracts

What is the conoid tubercle region of the clavicle?

The area where the clavicle attaches to the coracoid process Signup and view all the answers

What motion is coupled with posterior rotation of the clavicle?

Posterior tilting of the AC joint Signup and view all the answers

What is essential to full-range shoulder abduction?

Posterior rotation of the clavicle Signup and view all the answers

What drives scapula upward rotation during early shoulder abduction?

Multijoint kinematics and muscle-to-ligament forces Signup and view all the answers

What happens when the coracoclavicular ligament is unloaded?

The scapula continues upward rotation Signup and view all the answers

What type of force application rotates the clavicle posteriorly?

Posterior force application Signup and view all the answers

What does posterior rotation of the clavicle do to the attachment of the coracoclavicular ligament?

It moves it closer to the coracoid process Signup and view all the answers

What is the primary function of the coracoclavicular ligament?

To stabilize the AC joint Signup and view all the answers

What type of forces are involved in driving posterior rotation of the clavicle?

Multijoint kinematics and muscle-to-ligament forces Signup and view all the answers

Study Notes

Posterior rotation of the clavicle is driven by multijoint kinematics and muscle-to-ligament forces.
Coracoclavicular ligament is relatively slackened at rest.
Scapula upwardly rotates at the AC joint during early shoulder abduction.
Coracoclavicular ligament stretches during upward rotation.
Stretched ligament tension is transferred to the conoid tubercle region of the clavicle.
Force application rotates the clavicle posteriorly.
Posterior rotation places the clavicular attachment of the ligament closer to the coracoid process.
Unloading the ligament permits the scapula to continue upward rotation.
Posterior rotation of the clavicle is coupled with posterior tilting of the AC joint.
These motions are essential to full-range shoulder abduction.

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Description

Test your knowledge on the anatomy and mechanics behind posterior rotation of the clavicle and its role in shoulder abduction with this informative quiz. Boost your understanding of multijoint kinematics, ligament tension, and muscle forces that drive this complex process. Whether you're a student of human anatomy or a fitness enthusiast, this quiz will help you grasp the intricacies of shoulder mechanics and enhance your understanding of full-range shoulder abduction.