Podcast
Questions and Answers
What drives posterior rotation of the clavicle?
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?
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?
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?
What is the conoid tubercle region of the clavicle?
What motion is coupled with posterior rotation of the clavicle?
What motion is coupled with posterior rotation of the clavicle?
What is essential to full-range shoulder abduction?
What is essential to full-range shoulder abduction?
What drives scapula upward rotation during early shoulder abduction?
What drives scapula upward rotation during early shoulder abduction?
What happens when the coracoclavicular ligament is unloaded?
What happens when the coracoclavicular ligament is unloaded?
What type of force application rotates the clavicle posteriorly?
What type of force application rotates the clavicle posteriorly?
What does posterior rotation of the clavicle do to the attachment of the coracoclavicular ligament?
What does posterior rotation of the clavicle do to the attachment of the coracoclavicular ligament?
What is the primary function of the coracoclavicular ligament?
What is the primary function of the coracoclavicular ligament?
What type of forces are involved in driving posterior rotation of the clavicle?
What type of forces are involved in driving posterior rotation of the clavicle?
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.
